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1da177e4
LT		 1
2 LINUX ALLOCATED DEVICES (2.6+ version)
3
04c860c1 4 Maintained by Alan Cox <device@lanana.org>
1da177e4 5
e379ec7c 6 Last revised: 6th April 2009
1da177e4
LT		 7
8This list is the Linux Device List, the official registry of allocated
9device numbers and /dev directory nodes for the Linux operating
10system.
11
12The latest version of this list is available from
13http://www.lanana.org/docs/device-list/ or
14ftp://ftp.kernel.org/pub/linux/docs/device-list/. This version may be
15newer than the one distributed with the Linux kernel.
16
17The LaTeX version of this document is no longer maintained.
18
19This document is included by reference into the Filesystem Hierarchy
20Standard (FHS). The FHS is available from http://www.pathname.com/fhs/.
21
22Allocations marked (68k/Amiga) apply to Linux/68k on the Amiga
23platform only. Allocations marked (68k/Atari) apply to Linux/68k on
24the Atari platform only.
25
26The symbol {2.6} means the allocation is obsolete and scheduled for
27removal once kernel version 2.6 (or equivalent) is released. Some of these
28allocations have already been removed.
29
30This document is in the public domain. The author requests, however,
31that semantically altered versions are not distributed without
32permission of the author, assuming the author can be contacted without
33an unreasonable effort.
34
35In particular, please don't sent patches for this list to Linus, at
36least not without contacting me first.
37
38I do not have any information about these devices beyond what appears
39on this list. Any such information requests will be deleted without
40reply.
41
42
43 **** DEVICE DRIVERS AUTHORS PLEASE READ THIS ****
44
45To have a major number allocated, or a minor number in situations
46where that applies (e.g. busmice), please contact me with the
47appropriate device information. Also, if you have additional
48information regarding any of the devices listed below, or if I have
49made a mistake, I would greatly appreciate a note.
50
51I do, however, make a few requests about the nature of your report.
52This is necessary for me to be able to keep this list up to date and
53correct in a timely manner. First of all, *please* send it to the
54correct address... <device@lanana.org>. I receive hundreds of email
55messages a day, so mail sent to other addresses may very well get lost
56in the avalanche. Please put in a descriptive subject, so I can find
57your mail again should I need to. Too many people send me email
58saying just "device number request" in the subject.
59
60Second, please include a description of the device *in the same format
61as this list*. The reason for this is that it is the only way I have
62found to ensure I have all the requisite information to publish your
63device and avoid conflicts.
64
65Third, please don't assume that the distributed version of the list is
66up to date. Due to the number of registrations I have to maintain it
67in "batch mode", so there is likely additional registrations that
68haven't been listed yet.
69
04c860c1
AC		 70Fourth, remember that Linux now has extensive support for dynamic allocation
71of device numbering and can use sysfs and udev to handle the naming needs.
72There are still some exceptions in the serial and boot device area. Before
73asking for a device number make sure you actually need one.
74
1da177e4
LT		 75Finally, sometimes I have to play "namespace police." Please don't be
76offended. I often get submissions for /dev names that would be bound
77to cause conflicts down the road. I am trying to avoid getting in a
78situation where we would have to suffer an incompatible forward
79change. Therefore, please consult with me *before* you make your
80device names and numbers in any way public, at least to the point
81where it would be at all difficult to get them changed.
82
83Your cooperation is appreciated.
84
85
86 0 Unnamed devices (e.g. non-device mounts)
87 0 = reserved as null device number
88 See block major 144, 145, 146 for expansion areas.
89
90 1 char Memory devices
91 1 = /dev/mem Physical memory access
92 2 = /dev/kmem Kernel virtual memory access
93 3 = /dev/null Null device
94 4 = /dev/port I/O port access
95 5 = /dev/zero Null byte source
96 6 = /dev/core OBSOLETE - replaced by /proc/kcore
97 7 = /dev/full Returns ENOSPC on write
98 8 = /dev/random Nondeterministic random number gen.
99 9 = /dev/urandom Faster, less secure random number gen.
5d3f083d 100 10 = /dev/aio Asynchronous I/O notification interface
1da177e4 101 11 = /dev/kmsg Writes to this come out as printk's
8814842f
DJ		 102 12 = /dev/oldmem Used by crashdump kernels to access
103 the memory of the kernel that crashed.
30aaa5c6 104
1da177e4
LT		 105 1 block RAM disk
106 0 = /dev/ram0 First RAM disk
107 1 = /dev/ram1 Second RAM disk
108 ...
04c860c1 109 250 = /dev/initrd Initial RAM disk
1da177e4
LT		 110
111 Older kernels had /dev/ramdisk (1, 1) here.
112 /dev/initrd refers to a RAM disk which was preloaded
113 by the boot loader; newer kernels use /dev/ram0 for
114 the initrd.
115
116 2 char Pseudo-TTY masters
117 0 = /dev/ptyp0 First PTY master
118 1 = /dev/ptyp1 Second PTY master
119 ...
120 255 = /dev/ptyef 256th PTY master
121
122 Pseudo-tty's are named as follows:
123 * Masters are "pty", slaves are "tty";
124 * the fourth letter is one of pqrstuvwxyzabcde indicating
125 the 1st through 16th series of 16 pseudo-ttys each, and
126 * the fifth letter is one of 0123456789abcdef indicating
127 the position within the series.
128
129 These are the old-style (BSD) PTY devices; Unix98
130 devices are on major 128 and above and use the PTY
131 master multiplex (/dev/ptmx) to acquire a PTY on
132 demand.
30aaa5c6 133
1da177e4
LT		 134 2 block Floppy disks
135 0 = /dev/fd0 Controller 0, drive 0, autodetect
136 1 = /dev/fd1 Controller 0, drive 1, autodetect
137 2 = /dev/fd2 Controller 0, drive 2, autodetect
138 3 = /dev/fd3 Controller 0, drive 3, autodetect
139 128 = /dev/fd4 Controller 1, drive 0, autodetect
140 129 = /dev/fd5 Controller 1, drive 1, autodetect
141 130 = /dev/fd6 Controller 1, drive 2, autodetect
142 131 = /dev/fd7 Controller 1, drive 3, autodetect
143
144 To specify format, add to the autodetect device number:
145 0 = /dev/fd? Autodetect format
146 4 = /dev/fd?d360 5.25" 360K in a 360K drive(1)
147 20 = /dev/fd?h360 5.25" 360K in a 1200K drive(1)
148 48 = /dev/fd?h410 5.25" 410K in a 1200K drive
149 64 = /dev/fd?h420 5.25" 420K in a 1200K drive
150 24 = /dev/fd?h720 5.25" 720K in a 1200K drive
151 80 = /dev/fd?h880 5.25" 880K in a 1200K drive(1)
152 8 = /dev/fd?h1200 5.25" 1200K in a 1200K drive(1)
153 40 = /dev/fd?h1440 5.25" 1440K in a 1200K drive(1)
154 56 = /dev/fd?h1476 5.25" 1476K in a 1200K drive
155 72 = /dev/fd?h1494 5.25" 1494K in a 1200K drive
156 92 = /dev/fd?h1600 5.25" 1600K in a 1200K drive(1)
157
158 12 = /dev/fd?u360 3.5" 360K Double Density(2)
159 16 = /dev/fd?u720 3.5" 720K Double Density(1)
160 120 = /dev/fd?u800 3.5" 800K Double Density(2)
161 52 = /dev/fd?u820 3.5" 820K Double Density
162 68 = /dev/fd?u830 3.5" 830K Double Density
163 84 = /dev/fd?u1040 3.5" 1040K Double Density(1)
164 88 = /dev/fd?u1120 3.5" 1120K Double Density(1)
165 28 = /dev/fd?u1440 3.5" 1440K High Density(1)
166 124 = /dev/fd?u1600 3.5" 1600K High Density(1)
167 44 = /dev/fd?u1680 3.5" 1680K High Density(3)
168 60 = /dev/fd?u1722 3.5" 1722K High Density
169 76 = /dev/fd?u1743 3.5" 1743K High Density
170 96 = /dev/fd?u1760 3.5" 1760K High Density
171 116 = /dev/fd?u1840 3.5" 1840K High Density(3)
172 100 = /dev/fd?u1920 3.5" 1920K High Density(1)
173 32 = /dev/fd?u2880 3.5" 2880K Extra Density(1)
174 104 = /dev/fd?u3200 3.5" 3200K Extra Density
175 108 = /dev/fd?u3520 3.5" 3520K Extra Density
176 112 = /dev/fd?u3840 3.5" 3840K Extra Density(1)
177
178 36 = /dev/fd?CompaQ Compaq 2880K drive; obsolete?
179
180 (1) Autodetectable format
181 (2) Autodetectable format in a Double Density (720K) drive only
182 (3) Autodetectable format in a High Density (1440K) drive only
183
184 NOTE: The letter in the device name (d, q, h or u)
185 signifies the type of drive: 5.25" Double Density (d),
186 5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
187 (any model, u). The use of the capital letters D, H
188 and E for the 3.5" models have been deprecated, since
189 the drive type is insignificant for these devices.
190
191 3 char Pseudo-TTY slaves
192 0 = /dev/ttyp0 First PTY slave
193 1 = /dev/ttyp1 Second PTY slave
194 ...
195 255 = /dev/ttyef 256th PTY slave
196
197 These are the old-style (BSD) PTY devices; Unix98
198 devices are on major 136 and above.
199
200 3 block First MFM, RLL and IDE hard disk/CD-ROM interface
201 0 = /dev/hda Master: whole disk (or CD-ROM)
202 64 = /dev/hdb Slave: whole disk (or CD-ROM)
203
204 For partitions, add to the whole disk device number:
205 0 = /dev/hd? Whole disk
206 1 = /dev/hd?1 First partition
207 2 = /dev/hd?2 Second partition
208 ...
209 63 = /dev/hd?63 63rd partition
210
211 For Linux/i386, partitions 1-4 are the primary
212 partitions, and 5 and above are logical partitions.
213 Other versions of Linux use partitioning schemes
214 appropriate to their respective architectures.
215
216 4 char TTY devices
217 0 = /dev/tty0 Current virtual console
218
219 1 = /dev/tty1 First virtual console
220 ...
221 63 = /dev/tty63 63rd virtual console
222 64 = /dev/ttyS0 First UART serial port
223 ...
224 255 = /dev/ttyS191 192nd UART serial port
225
226 UART serial ports refer to 8250/16450/16550 series devices.
227
228 Older versions of the Linux kernel used this major
229 number for BSD PTY devices. As of Linux 2.1.115, this
230 is no longer supported. Use major numbers 2 and 3.
231
232 4 block Aliases for dynamically allocated major devices to be used
233 when its not possible to create the real device nodes
234 because the root filesystem is mounted read-only.
235
236 0 = /dev/root
237
238 5 char Alternate TTY devices
239 0 = /dev/tty Current TTY device
240 1 = /dev/console System console
241 2 = /dev/ptmx PTY master multiplex
24b4b67d 242 3 = /dev/ttyprintk User messages via printk TTY device
1da177e4
LT		 243 64 = /dev/cua0 Callout device for ttyS0
244 ...
245 255 = /dev/cua191 Callout device for ttyS191
246
247 (5,1) is /dev/console starting with Linux 2.1.71. See
248 the section on terminal devices for more information
249 on /dev/console.
250
251 6 char Parallel printer devices
252 0 = /dev/lp0 Parallel printer on parport0
253 1 = /dev/lp1 Parallel printer on parport1
254 ...
255
256 Current Linux kernels no longer have a fixed mapping
257 between parallel ports and I/O addresses. Instead,
258 they are redirected through the parport multiplex layer.
259
260 7 char Virtual console capture devices
261 0 = /dev/vcs Current vc text contents
262 1 = /dev/vcs1 tty1 text contents
263 ...
264 63 = /dev/vcs63 tty63 text contents
265 128 = /dev/vcsa Current vc text/attribute contents
266 129 = /dev/vcsa1 tty1 text/attribute contents
267 ...
268 191 = /dev/vcsa63 tty63 text/attribute contents
30aaa5c6 269
1da177e4
LT		 270 NOTE: These devices permit both read and write access.
271
272 7 block Loopback devices
11420211
JE		 273 0 = /dev/loop0 First loop device
274 1 = /dev/loop1 Second loop device
1da177e4
LT		 275 ...
276
11420211 277 The loop devices are used to mount filesystems not
1da177e4 278 associated with block devices. The binding to the
11420211 279 loop devices is handled by mount(8) or losetup(8).
1da177e4
LT		 280
281 8 block SCSI disk devices (0-15)
282 0 = /dev/sda First SCSI disk whole disk
283 16 = /dev/sdb Second SCSI disk whole disk
284 32 = /dev/sdc Third SCSI disk whole disk
285 ...
286 240 = /dev/sdp Sixteenth SCSI disk whole disk
287
288 Partitions are handled in the same way as for IDE
289 disks (see major number 3) except that the limit on
290 partitions is 15.
291
292 9 char SCSI tape devices
293 0 = /dev/st0 First SCSI tape, mode 0
294 1 = /dev/st1 Second SCSI tape, mode 0
295 ...
296 32 = /dev/st0l First SCSI tape, mode 1
297 33 = /dev/st1l Second SCSI tape, mode 1
298 ...
299 64 = /dev/st0m First SCSI tape, mode 2
300 65 = /dev/st1m Second SCSI tape, mode 2
301 ...
302 96 = /dev/st0a First SCSI tape, mode 3
303 97 = /dev/st1a Second SCSI tape, mode 3
304 ...
305 128 = /dev/nst0 First SCSI tape, mode 0, no rewind
306 129 = /dev/nst1 Second SCSI tape, mode 0, no rewind
307 ...
308 160 = /dev/nst0l First SCSI tape, mode 1, no rewind
309 161 = /dev/nst1l Second SCSI tape, mode 1, no rewind
310 ...
311 192 = /dev/nst0m First SCSI tape, mode 2, no rewind
312 193 = /dev/nst1m Second SCSI tape, mode 2, no rewind
313 ...
314 224 = /dev/nst0a First SCSI tape, mode 3, no rewind
315 225 = /dev/nst1a Second SCSI tape, mode 3, no rewind
316 ...
317
318 "No rewind" refers to the omission of the default
319 automatic rewind on device close. The MTREW or MTOFFL
320 ioctl()'s can be used to rewind the tape regardless of
321 the device used to access it.
322
323 9 block Metadisk (RAID) devices
324 0 = /dev/md0 First metadisk group
325 1 = /dev/md1 Second metadisk group
326 ...
327
328 The metadisk driver is used to span a
329 filesystem across multiple physical disks.
330
331 10 char Non-serial mice, misc features
332 0 = /dev/logibm Logitech bus mouse
333 1 = /dev/psaux PS/2-style mouse port
334 2 = /dev/inportbm Microsoft Inport bus mouse
335 3 = /dev/atibm ATI XL bus mouse
336 4 = /dev/jbm J-mouse
337 4 = /dev/amigamouse Amiga mouse (68k/Amiga)
338 5 = /dev/atarimouse Atari mouse
339 6 = /dev/sunmouse Sun mouse
340 7 = /dev/amigamouse1 Second Amiga mouse
341 8 = /dev/smouse Simple serial mouse driver
342 9 = /dev/pc110pad IBM PC-110 digitizer pad
343 10 = /dev/adbmouse Apple Desktop Bus mouse
344 11 = /dev/vrtpanel Vr41xx embedded touch panel
345 13 = /dev/vpcmouse Connectix Virtual PC Mouse
346 14 = /dev/touchscreen/ucb1x00 UCB 1x00 touchscreen
347 15 = /dev/touchscreen/mk712 MK712 touchscreen
348 128 = /dev/beep Fancy beep device
04c860c1 349 129 =
1da177e4
LT		 350 130 = /dev/watchdog Watchdog timer port
351 131 = /dev/temperature Machine internal temperature
352 132 = /dev/hwtrap Hardware fault trap
353 133 = /dev/exttrp External device trap
354 134 = /dev/apm_bios Advanced Power Management BIOS
355 135 = /dev/rtc Real Time Clock
356 139 = /dev/openprom SPARC OpenBoot PROM
357 140 = /dev/relay8 Berkshire Products Octal relay card
358 141 = /dev/relay16 Berkshire Products ISO-16 relay card
04c860c1 359 142 =
1da177e4
LT		 360 143 = /dev/pciconf PCI configuration space
361 144 = /dev/nvram Non-volatile configuration RAM
04c860c1 362 145 = /dev/hfmodem Soundcard shortwave modem control
1da177e4
LT		 363 146 = /dev/graphics Linux/SGI graphics device
364 147 = /dev/opengl Linux/SGI OpenGL pipe
365 148 = /dev/gfx Linux/SGI graphics effects device
366 149 = /dev/input/mouse Linux/SGI Irix emulation mouse
367 150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
368 151 = /dev/led Front panel LEDs
369 152 = /dev/kpoll Kernel Poll Driver
370 153 = /dev/mergemem Memory merge device
371 154 = /dev/pmu Macintosh PowerBook power manager
372 155 = /dev/isictl MultiTech ISICom serial control
373 156 = /dev/lcd Front panel LCD display
374 157 = /dev/ac Applicom Intl Profibus card
375 158 = /dev/nwbutton Netwinder external button
376 159 = /dev/nwdebug Netwinder debug interface
377 160 = /dev/nwflash Netwinder flash memory
378 161 = /dev/userdma User-space DMA access
379 162 = /dev/smbus System Management Bus
380 163 = /dev/lik Logitech Internet Keyboard
381 164 = /dev/ipmo Intel Intelligent Platform Management
382 165 = /dev/vmmon VMWare virtual machine monitor
383 166 = /dev/i2o/ctl I2O configuration manager
384 167 = /dev/specialix_sxctl Specialix serial control
385 168 = /dev/tcldrv Technology Concepts serial control
386 169 = /dev/specialix_rioctl Specialix RIO serial control
387 170 = /dev/thinkpad/thinkpad IBM Thinkpad devices
388 171 = /dev/srripc QNX4 API IPC manager
389 172 = /dev/usemaclone Semaphore clone device
390 173 = /dev/ipmikcs Intelligent Platform Management
391 174 = /dev/uctrl SPARCbook 3 microcontroller
392 175 = /dev/agpgart AGP Graphics Address Remapping Table
393 176 = /dev/gtrsc Gorgy Timing radio clock
394 177 = /dev/cbm Serial CBM bus
395 178 = /dev/jsflash JavaStation OS flash SIMM
396 179 = /dev/xsvc High-speed shared-mem/semaphore service
397 180 = /dev/vrbuttons Vr41xx button input device
398 181 = /dev/toshiba Toshiba laptop SMM support
399 182 = /dev/perfctr Performance-monitoring counters
400 183 = /dev/hwrng Generic random number generator
401 184 = /dev/cpu/microcode CPU microcode update interface
402 186 = /dev/atomicps Atomic shapshot of process state data
403 187 = /dev/irnet IrNET device
404 188 = /dev/smbusbios SMBus BIOS
405 189 = /dev/ussp_ctl User space serial port control
406 190 = /dev/crash Mission Critical Linux crash dump facility
407 191 = /dev/pcl181 <information missing>
408 192 = /dev/nas_xbus NAS xbus LCD/buttons access
409 193 = /dev/d7s SPARC 7-segment display
410 194 = /dev/zkshim Zero-Knowledge network shim control
411 195 = /dev/elographics/e2201 Elographics touchscreen E271-2201
412 198 = /dev/sexec Signed executable interface
413 199 = /dev/scanners/cuecat :CueCat barcode scanner
414 200 = /dev/net/tun TAP/TUN network device
415 201 = /dev/button/gulpb Transmeta GULP-B buttons
416 202 = /dev/emd/ctl Enhanced Metadisk RAID (EMD) control
417 204 = /dev/video/em8300 EM8300 DVD decoder control
418 205 = /dev/video/em8300_mv EM8300 DVD decoder video
419 206 = /dev/video/em8300_ma EM8300 DVD decoder audio
420 207 = /dev/video/em8300_sp EM8300 DVD decoder subpicture
421 208 = /dev/compaq/cpqphpc Compaq PCI Hot Plug Controller
422 209 = /dev/compaq/cpqrid Compaq Remote Insight Driver
30aaa5c6 423 210 = /dev/impi/bt IMPI coprocessor block transfer
1da177e4
LT		 424 211 = /dev/impi/smic IMPI coprocessor stream interface
425 212 = /dev/watchdogs/0 First watchdog device
426 213 = /dev/watchdogs/1 Second watchdog device
427 214 = /dev/watchdogs/2 Third watchdog device
428 215 = /dev/watchdogs/3 Fourth watchdog device
429 216 = /dev/fujitsu/apanel Fujitsu/Siemens application panel
430 217 = /dev/ni/natmotn National Instruments Motion
431 218 = /dev/kchuid Inter-process chuid control
432 219 = /dev/modems/mwave MWave modem firmware upload
433 220 = /dev/mptctl Message passing technology (MPT) control
434 221 = /dev/mvista/hssdsi Montavista PICMG hot swap system driver
435 222 = /dev/mvista/hasi Montavista PICMG high availability
436 223 = /dev/input/uinput User level driver support for input
437 224 = /dev/tpm TCPA TPM driver
438 225 = /dev/pps Pulse Per Second driver
439 226 = /dev/systrace Systrace device
440 227 = /dev/mcelog X86_64 Machine Check Exception driver
441 228 = /dev/hpet HPET driver
442 229 = /dev/fuse Fuse (virtual filesystem in user-space)
443 230 = /dev/midishare MidiShare driver
04c860c1
AC		 444 231 = /dev/snapshot System memory snapshot device
445 232 = /dev/kvm Kernel-based virtual machine (hardware virtualization extensions)
446 233 = /dev/kmview View-OS A process with a view
578454ff
KS		 447 234 = /dev/btrfs-control Btrfs control device
448 235 = /dev/autofs Autofs control device
7e507eb6 449 236 = /dev/mapper/control Device-Mapper control device
1da177e4
LT		 450 240-254 Reserved for local use
451 255 Reserved for MISC_DYNAMIC_MINOR
452
453 11 char Raw keyboard device (Linux/SPARC only)
454 0 = /dev/kbd Raw keyboard device
455
456 11 char Serial Mux device (Linux/PA-RISC only)
457 0 = /dev/ttyB0 First mux port
458 1 = /dev/ttyB1 Second mux port
459 ...
460
461 11 block SCSI CD-ROM devices
462 0 = /dev/scd0 First SCSI CD-ROM
463 1 = /dev/scd1 Second SCSI CD-ROM
464 ...
465
466 The prefix /dev/sr (instead of /dev/scd) has been deprecated.
467
468 12 char QIC-02 tape
469 2 = /dev/ntpqic11 QIC-11, no rewind-on-close
470 3 = /dev/tpqic11 QIC-11, rewind-on-close
471 4 = /dev/ntpqic24 QIC-24, no rewind-on-close
472 5 = /dev/tpqic24 QIC-24, rewind-on-close
473 6 = /dev/ntpqic120 QIC-120, no rewind-on-close
474 7 = /dev/tpqic120 QIC-120, rewind-on-close
475 8 = /dev/ntpqic150 QIC-150, no rewind-on-close
476 9 = /dev/tpqic150 QIC-150, rewind-on-close
477
478 The device names specified are proposed -- if there
479 are "standard" names for these devices, please let me know.
480
04c860c1 481 12 block
1da177e4
LT		 482
483 13 char Input core
484 0 = /dev/input/js0 First joystick
485 1 = /dev/input/js1 Second joystick
486 ...
487 32 = /dev/input/mouse0 First mouse
488 33 = /dev/input/mouse1 Second mouse
489 ...
490 63 = /dev/input/mice Unified mouse
491 64 = /dev/input/event0 First event queue
492 65 = /dev/input/event1 Second event queue
493 ...
494
495 Each device type has 5 bits (32 minors).
496
497 13 block 8-bit MFM/RLL/IDE controller
498 0 = /dev/xda First XT disk whole disk
499 64 = /dev/xdb Second XT disk whole disk
500
501 Partitions are handled in the same way as IDE disks
502 (see major number 3).
503
504 14 char Open Sound System (OSS)
505 0 = /dev/mixer Mixer control
506 1 = /dev/sequencer Audio sequencer
507 2 = /dev/midi00 First MIDI port
508 3 = /dev/dsp Digital audio
509 4 = /dev/audio Sun-compatible digital audio
04c860c1 510 6 =
1da177e4
LT		 511 7 = /dev/audioctl SPARC audio control device
512 8 = /dev/sequencer2 Sequencer -- alternate device
513 16 = /dev/mixer1 Second soundcard mixer control
514 17 = /dev/patmgr0 Sequencer patch manager
515 18 = /dev/midi01 Second MIDI port
516 19 = /dev/dsp1 Second soundcard digital audio
517 20 = /dev/audio1 Second soundcard Sun digital audio
518 33 = /dev/patmgr1 Sequencer patch manager
519 34 = /dev/midi02 Third MIDI port
520 50 = /dev/midi03 Fourth MIDI port
30aaa5c6 521
04c860c1 522 14 block
1da177e4
LT		 523
524 15 char Joystick
525 0 = /dev/js0 First analog joystick
526 1 = /dev/js1 Second analog joystick
527 ...
528 128 = /dev/djs0 First digital joystick
529 129 = /dev/djs1 Second digital joystick
530 ...
531 15 block Sony CDU-31A/CDU-33A CD-ROM
532 0 = /dev/sonycd Sony CDU-31a CD-ROM
533
534 16 char Non-SCSI scanners
535 0 = /dev/gs4500 Genius 4500 handheld scanner
30aaa5c6 536
1da177e4
LT		 537 16 block GoldStar CD-ROM
538 0 = /dev/gscd GoldStar CD-ROM
539
04c860c1 540 17 char OBSOLETE (was Chase serial card)
1da177e4
LT		 541 0 = /dev/ttyH0 First Chase port
542 1 = /dev/ttyH1 Second Chase port
543 ...
544 17 block Optics Storage CD-ROM
545 0 = /dev/optcd Optics Storage CD-ROM
546
04c860c1 547 18 char OBSOLETE (was Chase serial card - alternate devices)
1da177e4
LT		 548 0 = /dev/cuh0 Callout device for ttyH0
549 1 = /dev/cuh1 Callout device for ttyH1
550 ...
551 18 block Sanyo CD-ROM
552 0 = /dev/sjcd Sanyo CD-ROM
553
554 19 char Cyclades serial card
555 0 = /dev/ttyC0 First Cyclades port
556 ...
557 31 = /dev/ttyC31 32nd Cyclades port
30aaa5c6 558
1da177e4
LT		 559 19 block "Double" compressed disk
560 0 = /dev/double0 First compressed disk
561 ...
562 7 = /dev/double7 Eighth compressed disk
563 128 = /dev/cdouble0 Mirror of first compressed disk
564 ...
565 135 = /dev/cdouble7 Mirror of eighth compressed disk
566
567 See the Double documentation for the meaning of the
568 mirror devices.
569
570 20 char Cyclades serial card - alternate devices
571 0 = /dev/cub0 Callout device for ttyC0
572 ...
573 31 = /dev/cub31 Callout device for ttyC31
30aaa5c6 574
1da177e4
LT		 575 20 block Hitachi CD-ROM (under development)
576 0 = /dev/hitcd Hitachi CD-ROM
577
578 21 char Generic SCSI access
579 0 = /dev/sg0 First generic SCSI device
580 1 = /dev/sg1 Second generic SCSI device
581 ...
582
583 Most distributions name these /dev/sga, /dev/sgb...;
584 this sets an unnecessary limit of 26 SCSI devices in
585 the system and is counter to standard Linux
586 device-naming practice.
587
588 21 block Acorn MFM hard drive interface
589 0 = /dev/mfma First MFM drive whole disk
590 64 = /dev/mfmb Second MFM drive whole disk
591
592 This device is used on the ARM-based Acorn RiscPC.
593 Partitions are handled the same way as for IDE disks
30aaa5c6 594 (see major number 3).
1da177e4
LT		 595
596 22 char Digiboard serial card
597 0 = /dev/ttyD0 First Digiboard port
598 1 = /dev/ttyD1 Second Digiboard port
599 ...
600 22 block Second IDE hard disk/CD-ROM interface
601 0 = /dev/hdc Master: whole disk (or CD-ROM)
602 64 = /dev/hdd Slave: whole disk (or CD-ROM)
30aaa5c6 603
1da177e4
LT		 604 Partitions are handled the same way as for the first
605 interface (see major number 3).
606
607 23 char Digiboard serial card - alternate devices
608 0 = /dev/cud0 Callout device for ttyD0
609 1 = /dev/cud1 Callout device for ttyD1
610 ...
611 23 block Mitsumi proprietary CD-ROM
612 0 = /dev/mcd Mitsumi CD-ROM
613
614 24 char Stallion serial card
615 0 = /dev/ttyE0 Stallion port 0 card 0
616 1 = /dev/ttyE1 Stallion port 1 card 0
617 ...
618 64 = /dev/ttyE64 Stallion port 0 card 1
619 65 = /dev/ttyE65 Stallion port 1 card 1
620 ...
621 128 = /dev/ttyE128 Stallion port 0 card 2
622 129 = /dev/ttyE129 Stallion port 1 card 2
623 ...
624 192 = /dev/ttyE192 Stallion port 0 card 3
625 193 = /dev/ttyE193 Stallion port 1 card 3
626 ...
627 24 block Sony CDU-535 CD-ROM
628 0 = /dev/cdu535 Sony CDU-535 CD-ROM
629
630 25 char Stallion serial card - alternate devices
631 0 = /dev/cue0 Callout device for ttyE0
632 1 = /dev/cue1 Callout device for ttyE1
633 ...
634 64 = /dev/cue64 Callout device for ttyE64
635 65 = /dev/cue65 Callout device for ttyE65
636 ...
637 128 = /dev/cue128 Callout device for ttyE128
638 129 = /dev/cue129 Callout device for ttyE129
639 ...
640 192 = /dev/cue192 Callout device for ttyE192
641 193 = /dev/cue193 Callout device for ttyE193
642 ...
643 25 block First Matsushita (Panasonic/SoundBlaster) CD-ROM
644 0 = /dev/sbpcd0 Panasonic CD-ROM controller 0 unit 0
645 1 = /dev/sbpcd1 Panasonic CD-ROM controller 0 unit 1
646 2 = /dev/sbpcd2 Panasonic CD-ROM controller 0 unit 2
647 3 = /dev/sbpcd3 Panasonic CD-ROM controller 0 unit 3
648
04c860c1 649 26 char
30aaa5c6 650
1da177e4
LT		 651 26 block Second Matsushita (Panasonic/SoundBlaster) CD-ROM
652 0 = /dev/sbpcd4 Panasonic CD-ROM controller 1 unit 0
653 1 = /dev/sbpcd5 Panasonic CD-ROM controller 1 unit 1
654 2 = /dev/sbpcd6 Panasonic CD-ROM controller 1 unit 2
655 3 = /dev/sbpcd7 Panasonic CD-ROM controller 1 unit 3
656
657 27 char QIC-117 tape
658 0 = /dev/qft0 Unit 0, rewind-on-close
659 1 = /dev/qft1 Unit 1, rewind-on-close
660 2 = /dev/qft2 Unit 2, rewind-on-close
661 3 = /dev/qft3 Unit 3, rewind-on-close
662 4 = /dev/nqft0 Unit 0, no rewind-on-close
663 5 = /dev/nqft1 Unit 1, no rewind-on-close
664 6 = /dev/nqft2 Unit 2, no rewind-on-close
665 7 = /dev/nqft3 Unit 3, no rewind-on-close
666 16 = /dev/zqft0 Unit 0, rewind-on-close, compression
667 17 = /dev/zqft1 Unit 1, rewind-on-close, compression
668 18 = /dev/zqft2 Unit 2, rewind-on-close, compression
669 19 = /dev/zqft3 Unit 3, rewind-on-close, compression
670 20 = /dev/nzqft0 Unit 0, no rewind-on-close, compression
671 21 = /dev/nzqft1 Unit 1, no rewind-on-close, compression
672 22 = /dev/nzqft2 Unit 2, no rewind-on-close, compression
673 23 = /dev/nzqft3 Unit 3, no rewind-on-close, compression
674 32 = /dev/rawqft0 Unit 0, rewind-on-close, no file marks
675 33 = /dev/rawqft1 Unit 1, rewind-on-close, no file marks
676 34 = /dev/rawqft2 Unit 2, rewind-on-close, no file marks
677 35 = /dev/rawqft3 Unit 3, rewind-on-close, no file marks
678 36 = /dev/nrawqft0 Unit 0, no rewind-on-close, no file marks
679 37 = /dev/nrawqft1 Unit 1, no rewind-on-close, no file marks
680 38 = /dev/nrawqft2 Unit 2, no rewind-on-close, no file marks
681 39 = /dev/nrawqft3 Unit 3, no rewind-on-close, no file marks
30aaa5c6 682
1da177e4
LT		 683 27 block Third Matsushita (Panasonic/SoundBlaster) CD-ROM
684 0 = /dev/sbpcd8 Panasonic CD-ROM controller 2 unit 0
685 1 = /dev/sbpcd9 Panasonic CD-ROM controller 2 unit 1
686 2 = /dev/sbpcd10 Panasonic CD-ROM controller 2 unit 2
687 3 = /dev/sbpcd11 Panasonic CD-ROM controller 2 unit 3
688
689 28 char Stallion serial card - card programming
690 0 = /dev/staliomem0 First Stallion card I/O memory
691 1 = /dev/staliomem1 Second Stallion card I/O memory
692 2 = /dev/staliomem2 Third Stallion card I/O memory
693 3 = /dev/staliomem3 Fourth Stallion card I/O memory
30aaa5c6 694
1da177e4
LT		 695 28 char Atari SLM ACSI laser printer (68k/Atari)
696 0 = /dev/slm0 First SLM laser printer
697 1 = /dev/slm1 Second SLM laser printer
698 ...
699 28 block Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
700 0 = /dev/sbpcd12 Panasonic CD-ROM controller 3 unit 0
701 1 = /dev/sbpcd13 Panasonic CD-ROM controller 3 unit 1
702 2 = /dev/sbpcd14 Panasonic CD-ROM controller 3 unit 2
703 3 = /dev/sbpcd15 Panasonic CD-ROM controller 3 unit 3
30aaa5c6 704
1da177e4
LT		 705 28 block ACSI disk (68k/Atari)
706 0 = /dev/ada First ACSI disk whole disk
707 16 = /dev/adb Second ACSI disk whole disk
708 32 = /dev/adc Third ACSI disk whole disk
709 ...
710 240 = /dev/adp 16th ACSI disk whole disk
711
712 Partitions are handled in the same way as for IDE
713 disks (see major number 3) except that the limit on
714 partitions is 15, like SCSI.
715
716 29 char Universal frame buffer
717 0 = /dev/fb0 First frame buffer
718 1 = /dev/fb1 Second frame buffer
719 ...
720 31 = /dev/fb31 32nd frame buffer
721
722 29 block Aztech/Orchid/Okano/Wearnes CD-ROM
723 0 = /dev/aztcd Aztech CD-ROM
724
725 30 char iBCS-2 compatibility devices
726 0 = /dev/socksys Socket access
727 1 = /dev/spx SVR3 local X interface
728 32 = /dev/inet/ip Network access
729 33 = /dev/inet/icmp
730 34 = /dev/inet/ggp
731 35 = /dev/inet/ipip
732 36 = /dev/inet/tcp
733 37 = /dev/inet/egp
734 38 = /dev/inet/pup
735 39 = /dev/inet/udp
736 40 = /dev/inet/idp
737 41 = /dev/inet/rawip
738
739 Additionally, iBCS-2 requires the following links:
740
741 /dev/ip -> /dev/inet/ip
742 /dev/icmp -> /dev/inet/icmp
743 /dev/ggp -> /dev/inet/ggp
744 /dev/ipip -> /dev/inet/ipip
745 /dev/tcp -> /dev/inet/tcp
746 /dev/egp -> /dev/inet/egp
747 /dev/pup -> /dev/inet/pup
748 /dev/udp -> /dev/inet/udp
749 /dev/idp -> /dev/inet/idp
750 /dev/rawip -> /dev/inet/rawip
751 /dev/inet/arp -> /dev/inet/udp
752 /dev/inet/rip -> /dev/inet/udp
753 /dev/nfsd -> /dev/socksys
754 /dev/X0R -> /dev/null (? apparently not required ?)
755
756 30 block Philips LMS CM-205 CD-ROM
757 0 = /dev/cm205cd Philips LMS CM-205 CD-ROM
758
759 /dev/lmscd is an older name for this device. This
760 driver does not work with the CM-205MS CD-ROM.
761
762 31 char MPU-401 MIDI
763 0 = /dev/mpu401data MPU-401 data port
764 1 = /dev/mpu401stat MPU-401 status port
30aaa5c6 765
1da177e4
LT		 766 31 block ROM/flash memory card
767 0 = /dev/rom0 First ROM card (rw)
768 ...
769 7 = /dev/rom7 Eighth ROM card (rw)
770 8 = /dev/rrom0 First ROM card (ro)
771 ...
772 15 = /dev/rrom7 Eighth ROM card (ro)
773 16 = /dev/flash0 First flash memory card (rw)
774 ...
775 23 = /dev/flash7 Eighth flash memory card (rw)
776 24 = /dev/rflash0 First flash memory card (ro)
777 ...
778 31 = /dev/rflash7 Eighth flash memory card (ro)
779
780 The read-write (rw) devices support back-caching
781 written data in RAM, as well as writing to flash RAM
782 devices. The read-only devices (ro) support reading
783 only.
784
785 32 char Specialix serial card
786 0 = /dev/ttyX0 First Specialix port
787 1 = /dev/ttyX1 Second Specialix port
788 ...
789 32 block Philips LMS CM-206 CD-ROM
790 0 = /dev/cm206cd Philips LMS CM-206 CD-ROM
791
792 33 char Specialix serial card - alternate devices
793 0 = /dev/cux0 Callout device for ttyX0
794 1 = /dev/cux1 Callout device for ttyX1
795 ...
796 33 block Third IDE hard disk/CD-ROM interface
797 0 = /dev/hde Master: whole disk (or CD-ROM)
798 64 = /dev/hdf Slave: whole disk (or CD-ROM)
799
800 Partitions are handled the same way as for the first
801 interface (see major number 3).
802
803 34 char Z8530 HDLC driver
804 0 = /dev/scc0 First Z8530, first port
805 1 = /dev/scc1 First Z8530, second port
806 2 = /dev/scc2 Second Z8530, first port
807 3 = /dev/scc3 Second Z8530, second port
808 ...
809
810 In a previous version these devices were named
811 /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
812 on.
813
814 34 block Fourth IDE hard disk/CD-ROM interface
815 0 = /dev/hdg Master: whole disk (or CD-ROM)
816 64 = /dev/hdh Slave: whole disk (or CD-ROM)
30aaa5c6 817
1da177e4
LT		 818 Partitions are handled the same way as for the first
819 interface (see major number 3).
820
821 35 char tclmidi MIDI driver
822 0 = /dev/midi0 First MIDI port, kernel timed
823 1 = /dev/midi1 Second MIDI port, kernel timed
824 2 = /dev/midi2 Third MIDI port, kernel timed
825 3 = /dev/midi3 Fourth MIDI port, kernel timed
826 64 = /dev/rmidi0 First MIDI port, untimed
827 65 = /dev/rmidi1 Second MIDI port, untimed
828 66 = /dev/rmidi2 Third MIDI port, untimed
829 67 = /dev/rmidi3 Fourth MIDI port, untimed
830 128 = /dev/smpte0 First MIDI port, SMPTE timed
831 129 = /dev/smpte1 Second MIDI port, SMPTE timed
832 130 = /dev/smpte2 Third MIDI port, SMPTE timed
833 131 = /dev/smpte3 Fourth MIDI port, SMPTE timed
30aaa5c6 834
1da177e4
LT		 835 35 block Slow memory ramdisk
836 0 = /dev/slram Slow memory ramdisk
837
838 36 char Netlink support
839 0 = /dev/route Routing, device updates, kernel to user
840 1 = /dev/skip enSKIP security cache control
841 3 = /dev/fwmonitor Firewall packet copies
842 16 = /dev/tap0 First Ethertap device
843 ...
844 31 = /dev/tap15 16th Ethertap device
30aaa5c6 845
1da177e4
LT		 846 36 block MCA ESDI hard disk
847 0 = /dev/eda First ESDI disk whole disk
848 64 = /dev/edb Second ESDI disk whole disk
849 ...
850
851 Partitions are handled in the same way as IDE disks
852 (see major number 3).
853
854 37 char IDE tape
855 0 = /dev/ht0 First IDE tape
856 1 = /dev/ht1 Second IDE tape
857 ...
858 128 = /dev/nht0 First IDE tape, no rewind-on-close
859 129 = /dev/nht1 Second IDE tape, no rewind-on-close
860 ...
861
862 Currently, only one IDE tape drive is supported.
863
864 37 block Zorro II ramdisk
865 0 = /dev/z2ram Zorro II ramdisk
866
867 38 char Myricom PCI Myrinet board
868 0 = /dev/mlanai0 First Myrinet board
869 1 = /dev/mlanai1 Second Myrinet board
870 ...
871
872 This device is used for status query, board control
873 and "user level packet I/O." This board is also
874 accessible as a standard networking "eth" device.
875
04c860c1 876 38 block OBSOLETE (was Linux/AP+)
1da177e4
LT		 877
878 39 char ML-16P experimental I/O board
879 0 = /dev/ml16pa-a0 First card, first analog channel
880 1 = /dev/ml16pa-a1 First card, second analog channel
881 ...
882 15 = /dev/ml16pa-a15 First card, 16th analog channel
883 16 = /dev/ml16pa-d First card, digital lines
884 17 = /dev/ml16pa-c0 First card, first counter/timer
885 18 = /dev/ml16pa-c1 First card, second counter/timer
886 19 = /dev/ml16pa-c2 First card, third counter/timer
887 32 = /dev/ml16pb-a0 Second card, first analog channel
888 33 = /dev/ml16pb-a1 Second card, second analog channel
889 ...
890 47 = /dev/ml16pb-a15 Second card, 16th analog channel
891 48 = /dev/ml16pb-d Second card, digital lines
892 49 = /dev/ml16pb-c0 Second card, first counter/timer
893 50 = /dev/ml16pb-c1 Second card, second counter/timer
894 51 = /dev/ml16pb-c2 Second card, third counter/timer
895 ...
04c860c1 896 39 block
1da177e4 897
04c860c1 898 40 char
30aaa5c6 899
04c860c1 900 40 block
1da177e4
LT		 901
902 41 char Yet Another Micro Monitor
903 0 = /dev/yamm Yet Another Micro Monitor
30aaa5c6 904
04c860c1 905 41 block
1da177e4
LT		 906
907 42 char Demo/sample use
30aaa5c6 908
1da177e4
LT		 909 42 block Demo/sample use
910
911 This number is intended for use in sample code, as
912 well as a general "example" device number. It
913 should never be used for a device driver that is being
914 distributed; either obtain an official number or use
915 the local/experimental range. The sudden addition or
916 removal of a driver with this number should not cause
917 ill effects to the system (bugs excepted.)
918
919 IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
920 DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
921
922 43 char isdn4linux virtual modem
923 0 = /dev/ttyI0 First virtual modem
924 ...
925 63 = /dev/ttyI63 64th virtual modem
30aaa5c6 926
1da177e4
LT		 927 43 block Network block devices
928 0 = /dev/nb0 First network block device
929 1 = /dev/nb1 Second network block device
930 ...
931
932 Network Block Device is somehow similar to loopback
933 devices: If you read from it, it sends packet across
934 network asking server for data. If you write to it, it
935 sends packet telling server to write. It could be used
936 to mounting filesystems over the net, swapping over
937 the net, implementing block device in userland etc.
938
939 44 char isdn4linux virtual modem - alternate devices
940 0 = /dev/cui0 Callout device for ttyI0
941 ...
942 63 = /dev/cui63 Callout device for ttyI63
30aaa5c6 943
1da177e4
LT		 944 44 block Flash Translation Layer (FTL) filesystems
945 0 = /dev/ftla FTL on first Memory Technology Device
946 16 = /dev/ftlb FTL on second Memory Technology Device
947 32 = /dev/ftlc FTL on third Memory Technology Device
948 ...
30aaa5c6 949 240 = /dev/ftlp FTL on 16th Memory Technology Device
1da177e4
LT		 950
951 Partitions are handled in the same way as for IDE
11420211 952 disks (see major number 3) except that the partition
1da177e4
LT		 953 limit is 15 rather than 63 per disk (same as SCSI.)
954
955 45 char isdn4linux ISDN BRI driver
956 0 = /dev/isdn0 First virtual B channel raw data
957 ...
958 63 = /dev/isdn63 64th virtual B channel raw data
959 64 = /dev/isdnctrl0 First channel control/debug
960 ...
961 127 = /dev/isdnctrl63 64th channel control/debug
962
963 128 = /dev/ippp0 First SyncPPP device
964 ...
965 191 = /dev/ippp63 64th SyncPPP device
966
967 255 = /dev/isdninfo ISDN monitor interface
30aaa5c6 968
1da177e4
LT		 969 45 block Parallel port IDE disk devices
970 0 = /dev/pda First parallel port IDE disk
971 16 = /dev/pdb Second parallel port IDE disk
972 32 = /dev/pdc Third parallel port IDE disk
973 48 = /dev/pdd Fourth parallel port IDE disk
974
975 Partitions are handled in the same way as for IDE
976 disks (see major number 3) except that the partition
977 limit is 15 rather than 63 per disk.
978
979 46 char Comtrol Rocketport serial card
980 0 = /dev/ttyR0 First Rocketport port
981 1 = /dev/ttyR1 Second Rocketport port
982 ...
983 46 block Parallel port ATAPI CD-ROM devices
984 0 = /dev/pcd0 First parallel port ATAPI CD-ROM
985 1 = /dev/pcd1 Second parallel port ATAPI CD-ROM
986 2 = /dev/pcd2 Third parallel port ATAPI CD-ROM
987 3 = /dev/pcd3 Fourth parallel port ATAPI CD-ROM
988
989 47 char Comtrol Rocketport serial card - alternate devices
990 0 = /dev/cur0 Callout device for ttyR0
991 1 = /dev/cur1 Callout device for ttyR1
992 ...
993 47 block Parallel port ATAPI disk devices
994 0 = /dev/pf0 First parallel port ATAPI disk
995 1 = /dev/pf1 Second parallel port ATAPI disk
996 2 = /dev/pf2 Third parallel port ATAPI disk
997 3 = /dev/pf3 Fourth parallel port ATAPI disk
998
999 This driver is intended for floppy disks and similar
1000 devices and hence does not support partitioning.
1001
1002 48 char SDL RISCom serial card
1003 0 = /dev/ttyL0 First RISCom port
1004 1 = /dev/ttyL1 Second RISCom port
1005 ...
1006 48 block Mylex DAC960 PCI RAID controller; first controller
1007 0 = /dev/rd/c0d0 First disk, whole disk
1008 8 = /dev/rd/c0d1 Second disk, whole disk
1009 ...
1010 248 = /dev/rd/c0d31 32nd disk, whole disk
1011
1012 For partitions add:
1013 0 = /dev/rd/c?d? Whole disk
1014 1 = /dev/rd/c?d?p1 First partition
1015 ...
1016 7 = /dev/rd/c?d?p7 Seventh partition
1017
1018 49 char SDL RISCom serial card - alternate devices
1019 0 = /dev/cul0 Callout device for ttyL0
1020 1 = /dev/cul1 Callout device for ttyL1
1021 ...
1022 49 block Mylex DAC960 PCI RAID controller; second controller
1023 0 = /dev/rd/c1d0 First disk, whole disk
1024 8 = /dev/rd/c1d1 Second disk, whole disk
1025 ...
1026 248 = /dev/rd/c1d31 32nd disk, whole disk
1027
1028 Partitions are handled as for major 48.
1029
1030 50 char Reserved for GLINT
1031
1032 50 block Mylex DAC960 PCI RAID controller; third controller
1033 0 = /dev/rd/c2d0 First disk, whole disk
1034 8 = /dev/rd/c2d1 Second disk, whole disk
1035 ...
1036 248 = /dev/rd/c2d31 32nd disk, whole disk
1037
1038 51 char Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
1039 0 = /dev/bc0 First Baycom radio modem
1040 1 = /dev/bc1 Second Baycom radio modem
1041 ...
1042 51 block Mylex DAC960 PCI RAID controller; fourth controller
1043 0 = /dev/rd/c3d0 First disk, whole disk
1044 8 = /dev/rd/c3d1 Second disk, whole disk
1045 ...
1046 248 = /dev/rd/c3d31 32nd disk, whole disk
1047
1048 Partitions are handled as for major 48.
1049
1050 52 char Spellcaster DataComm/BRI ISDN card
1051 0 = /dev/dcbri0 First DataComm card
1052 1 = /dev/dcbri1 Second DataComm card
1053 2 = /dev/dcbri2 Third DataComm card
1054 3 = /dev/dcbri3 Fourth DataComm card
30aaa5c6 1055
1da177e4
LT		 1056 52 block Mylex DAC960 PCI RAID controller; fifth controller
1057 0 = /dev/rd/c4d0 First disk, whole disk
1058 8 = /dev/rd/c4d1 Second disk, whole disk
1059 ...
1060 248 = /dev/rd/c4d31 32nd disk, whole disk
1061
1062 Partitions are handled as for major 48.
1063
1064 53 char BDM interface for remote debugging MC683xx microcontrollers
1065 0 = /dev/pd_bdm0 PD BDM interface on lp0
1066 1 = /dev/pd_bdm1 PD BDM interface on lp1
1067 2 = /dev/pd_bdm2 PD BDM interface on lp2
1068 4 = /dev/icd_bdm0 ICD BDM interface on lp0
1069 5 = /dev/icd_bdm1 ICD BDM interface on lp1
1070 6 = /dev/icd_bdm2 ICD BDM interface on lp2
1071
1072 This device is used for the interfacing to the MC683xx
1073 microcontrollers via Background Debug Mode by use of a
1074 Parallel Port interface. PD is the Motorola Public
1075 Domain Interface and ICD is the commercial interface
1076 by P&E.
1077
1078 53 block Mylex DAC960 PCI RAID controller; sixth controller
1079 0 = /dev/rd/c5d0 First disk, whole disk
1080 8 = /dev/rd/c5d1 Second disk, whole disk
1081 ...
1082 248 = /dev/rd/c5d31 32nd disk, whole disk
1083
1084 Partitions are handled as for major 48.
1085
1086 54 char Electrocardiognosis Holter serial card
1087 0 = /dev/holter0 First Holter port
1088 1 = /dev/holter1 Second Holter port
1089 2 = /dev/holter2 Third Holter port
1090
1091 A custom serial card used by Electrocardiognosis SRL
1092 <mseritan@ottonel.pub.ro> to transfer data from Holter
1093 24-hour heart monitoring equipment.
1094
1095 54 block Mylex DAC960 PCI RAID controller; seventh controller
1096 0 = /dev/rd/c6d0 First disk, whole disk
1097 8 = /dev/rd/c6d1 Second disk, whole disk
1098 ...
1099 248 = /dev/rd/c6d31 32nd disk, whole disk
1100
1101 Partitions are handled as for major 48.
1102
1103 55 char DSP56001 digital signal processor
1104 0 = /dev/dsp56k First DSP56001
30aaa5c6 1105
5d3f083d 1106 55 block Mylex DAC960 PCI RAID controller; eighth controller
1da177e4
LT		 1107 0 = /dev/rd/c7d0 First disk, whole disk
1108 8 = /dev/rd/c7d1 Second disk, whole disk
1109 ...
1110 248 = /dev/rd/c7d31 32nd disk, whole disk
1111
1112 Partitions are handled as for major 48.
1113
1114 56 char Apple Desktop Bus
1115 0 = /dev/adb ADB bus control
1116
1117 Additional devices will be added to this number, all
1118 starting with /dev/adb.
1119
1120 56 block Fifth IDE hard disk/CD-ROM interface
1121 0 = /dev/hdi Master: whole disk (or CD-ROM)
1122 64 = /dev/hdj Slave: whole disk (or CD-ROM)
1123
1124 Partitions are handled the same way as for the first
1125 interface (see major number 3).
1126
1127 57 char Hayes ESP serial card
1128 0 = /dev/ttyP0 First ESP port
1129 1 = /dev/ttyP1 Second ESP port
1130 ...
1131
1132 57 block Sixth IDE hard disk/CD-ROM interface
1133 0 = /dev/hdk Master: whole disk (or CD-ROM)
1134 64 = /dev/hdl Slave: whole disk (or CD-ROM)
1135
1136 Partitions are handled the same way as for the first
1137 interface (see major number 3).
1138
1139 58 char Hayes ESP serial card - alternate devices
1140 0 = /dev/cup0 Callout device for ttyP0
1141 1 = /dev/cup1 Callout device for ttyP1
1142 ...
30aaa5c6 1143
1da177e4
LT		 1144 58 block Reserved for logical volume manager
1145
1146 59 char sf firewall package
1147 0 = /dev/firewall Communication with sf kernel module
1148
1149 59 block Generic PDA filesystem device
1150 0 = /dev/pda0 First PDA device
1151 1 = /dev/pda1 Second PDA device
1152 ...
1153
1154 The pda devices are used to mount filesystems on
1155 remote pda's (basically slow handheld machines with
1156 proprietary OS's and limited memory and storage
1157 running small fs translation drivers) through serial /
1158 IRDA / parallel links.
1159
1160 NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1161
1162 60-63 char LOCAL/EXPERIMENTAL USE
30aaa5c6 1163
1da177e4
LT		 1164 60-63 block LOCAL/EXPERIMENTAL USE
1165 Allocated for local/experimental use. For devices not
1166 assigned official numbers, these ranges should be
1167 used in order to avoid conflicting with future assignments.
1168
1169 64 char ENskip kernel encryption package
1170 0 = /dev/enskip Communication with ENskip kernel module
1171
1172 64 block Scramdisk/DriveCrypt encrypted devices
1173 0 = /dev/scramdisk/master Master node for ioctls
1174 1 = /dev/scramdisk/1 First encrypted device
1175 2 = /dev/scramdisk/2 Second encrypted device
1176 ...
1177 255 = /dev/scramdisk/255 255th encrypted device
1178
1179 The filename of the encrypted container and the passwords
1180 are sent via ioctls (using the sdmount tool) to the master
1181 node which then activates them via one of the
11420211 1182 /dev/scramdisk/x nodes for loop mounting (all handled
1da177e4
LT		 1183 through the sdmount tool).
1184
1185 Requested by: andy@scramdisklinux.org
1186
1187 65 char Sundance "plink" Transputer boards (obsolete, unused)
1188 0 = /dev/plink0 First plink device
1189 1 = /dev/plink1 Second plink device
1190 2 = /dev/plink2 Third plink device
1191 3 = /dev/plink3 Fourth plink device
1192 64 = /dev/rplink0 First plink device, raw
1193 65 = /dev/rplink1 Second plink device, raw
1194 66 = /dev/rplink2 Third plink device, raw
1195 67 = /dev/rplink3 Fourth plink device, raw
1196 128 = /dev/plink0d First plink device, debug
1197 129 = /dev/plink1d Second plink device, debug
1198 130 = /dev/plink2d Third plink device, debug
1199 131 = /dev/plink3d Fourth plink device, debug
1200 192 = /dev/rplink0d First plink device, raw, debug
1201 193 = /dev/rplink1d Second plink device, raw, debug
1202 194 = /dev/rplink2d Third plink device, raw, debug
1203 195 = /dev/rplink3d Fourth plink device, raw, debug
1204
1205 This is a commercial driver; contact James Howes
1206 <jth@prosig.demon.co.uk> for information.
1207
1208 65 block SCSI disk devices (16-31)
1209 0 = /dev/sdq 17th SCSI disk whole disk
1210 16 = /dev/sdr 18th SCSI disk whole disk
1211 32 = /dev/sds 19th SCSI disk whole disk
1212 ...
1213 240 = /dev/sdaf 32nd SCSI disk whole disk
1214
1215 Partitions are handled in the same way as for IDE
1216 disks (see major number 3) except that the limit on
1217 partitions is 15.
1218
1219 66 char YARC PowerPC PCI coprocessor card
1220 0 = /dev/yppcpci0 First YARC card
1221 1 = /dev/yppcpci1 Second YARC card
1222 ...
1223
1224 66 block SCSI disk devices (32-47)
1225 0 = /dev/sdag 33th SCSI disk whole disk
1226 16 = /dev/sdah 34th SCSI disk whole disk
1227 32 = /dev/sdai 35th SCSI disk whole disk
1228 ...
1229 240 = /dev/sdav 48nd SCSI disk whole disk
1230
1231 Partitions are handled in the same way as for IDE
1232 disks (see major number 3) except that the limit on
1233 partitions is 15.
1234
1235 67 char Coda network file system
1236 0 = /dev/cfs0 Coda cache manager
1237
1238 See http://www.coda.cs.cmu.edu for information about Coda.
1239
1240 67 block SCSI disk devices (48-63)
1241 0 = /dev/sdaw 49th SCSI disk whole disk
1242 16 = /dev/sdax 50th SCSI disk whole disk
1243 32 = /dev/sday 51st SCSI disk whole disk
1244 ...
1245 240 = /dev/sdbl 64th SCSI disk whole disk
1246
1247 Partitions are handled in the same way as for IDE
1248 disks (see major number 3) except that the limit on
1249 partitions is 15.
1250
1251 68 char CAPI 2.0 interface
1252 0 = /dev/capi20 Control device
1253 1 = /dev/capi20.00 First CAPI 2.0 application
1254 2 = /dev/capi20.01 Second CAPI 2.0 application
1255 ...
1256 20 = /dev/capi20.19 19th CAPI 2.0 application
1257
1258 ISDN CAPI 2.0 driver for use with CAPI 2.0
1259 applications; currently supports the AVM B1 card.
1260
1261 68 block SCSI disk devices (64-79)
1262 0 = /dev/sdbm 65th SCSI disk whole disk
1263 16 = /dev/sdbn 66th SCSI disk whole disk
1264 32 = /dev/sdbo 67th SCSI disk whole disk
1265 ...
1266 240 = /dev/sdcb 80th SCSI disk whole disk
1267
1268 Partitions are handled in the same way as for IDE
1269 disks (see major number 3) except that the limit on
1270 partitions is 15.
1271
1272 69 char MA16 numeric accelerator card
1273 0 = /dev/ma16 Board memory access
1274
1275 69 block SCSI disk devices (80-95)
1276 0 = /dev/sdcc 81st SCSI disk whole disk
1277 16 = /dev/sdcd 82nd SCSI disk whole disk
1278 32 = /dev/sdce 83th SCSI disk whole disk
1279 ...
1280 240 = /dev/sdcr 96th SCSI disk whole disk
1281
1282 Partitions are handled in the same way as for IDE
1283 disks (see major number 3) except that the limit on
1284 partitions is 15.
1285
1286 70 char SpellCaster Protocol Services Interface
1287 0 = /dev/apscfg Configuration interface
1288 1 = /dev/apsauth Authentication interface
1289 2 = /dev/apslog Logging interface
1290 3 = /dev/apsdbg Debugging interface
1291 64 = /dev/apsisdn ISDN command interface
1292 65 = /dev/apsasync Async command interface
1293 128 = /dev/apsmon Monitor interface
1294
1295 70 block SCSI disk devices (96-111)
1296 0 = /dev/sdcs 97th SCSI disk whole disk
1297 16 = /dev/sdct 98th SCSI disk whole disk
1298 32 = /dev/sdcu 99th SCSI disk whole disk
1299 ...
1300 240 = /dev/sddh 112nd SCSI disk whole disk
1301
1302 Partitions are handled in the same way as for IDE
1303 disks (see major number 3) except that the limit on
1304 partitions is 15.
1305
1306 71 char Computone IntelliPort II serial card
1307 0 = /dev/ttyF0 IntelliPort II board 0, port 0
1308 1 = /dev/ttyF1 IntelliPort II board 0, port 1
1309 ...
1310 63 = /dev/ttyF63 IntelliPort II board 0, port 63
1311 64 = /dev/ttyF64 IntelliPort II board 1, port 0
1312 65 = /dev/ttyF65 IntelliPort II board 1, port 1
1313 ...
1314 127 = /dev/ttyF127 IntelliPort II board 1, port 63
1315 128 = /dev/ttyF128 IntelliPort II board 2, port 0
1316 129 = /dev/ttyF129 IntelliPort II board 2, port 1
1317 ...
1318 191 = /dev/ttyF191 IntelliPort II board 2, port 63
1319 192 = /dev/ttyF192 IntelliPort II board 3, port 0
1320 193 = /dev/ttyF193 IntelliPort II board 3, port 1
1321 ...
1322 255 = /dev/ttyF255 IntelliPort II board 3, port 63
1323
1324 71 block SCSI disk devices (112-127)
1325 0 = /dev/sddi 113th SCSI disk whole disk
1326 16 = /dev/sddj 114th SCSI disk whole disk
1327 32 = /dev/sddk 115th SCSI disk whole disk
1328 ...
1329 240 = /dev/sddx 128th SCSI disk whole disk
1330
1331 Partitions are handled in the same way as for IDE
1332 disks (see major number 3) except that the limit on
1333 partitions is 15.
1334
1335 72 char Computone IntelliPort II serial card - alternate devices
1336 0 = /dev/cuf0 Callout device for ttyF0
1337 1 = /dev/cuf1 Callout device for ttyF1
1338 ...
1339 63 = /dev/cuf63 Callout device for ttyF63
1340 64 = /dev/cuf64 Callout device for ttyF64
1341 65 = /dev/cuf65 Callout device for ttyF65
1342 ...
1343 127 = /dev/cuf127 Callout device for ttyF127
1344 128 = /dev/cuf128 Callout device for ttyF128
1345 129 = /dev/cuf129 Callout device for ttyF129
1346 ...
1347 191 = /dev/cuf191 Callout device for ttyF191
1348 192 = /dev/cuf192 Callout device for ttyF192
1349 193 = /dev/cuf193 Callout device for ttyF193
1350 ...
1351 255 = /dev/cuf255 Callout device for ttyF255
1352
1353 72 block Compaq Intelligent Drive Array, first controller
1354 0 = /dev/ida/c0d0 First logical drive whole disk
1355 16 = /dev/ida/c0d1 Second logical drive whole disk
1356 ...
1357 240 = /dev/ida/c0d15 16th logical drive whole disk
1358
1359 Partitions are handled the same way as for Mylex
1360 DAC960 (see major number 48) except that the limit on
1361 partitions is 15.
1362
1363 73 char Computone IntelliPort II serial card - control devices
1364 0 = /dev/ip2ipl0 Loadware device for board 0
1365 1 = /dev/ip2stat0 Status device for board 0
1366 4 = /dev/ip2ipl1 Loadware device for board 1
1367 5 = /dev/ip2stat1 Status device for board 1
1368 8 = /dev/ip2ipl2 Loadware device for board 2
1369 9 = /dev/ip2stat2 Status device for board 2
1370 12 = /dev/ip2ipl3 Loadware device for board 3
1371 13 = /dev/ip2stat3 Status device for board 3
1372
1373 73 block Compaq Intelligent Drive Array, second controller
1374 0 = /dev/ida/c1d0 First logical drive whole disk
1375 16 = /dev/ida/c1d1 Second logical drive whole disk
1376 ...
1377 240 = /dev/ida/c1d15 16th logical drive whole disk
1378
1379 Partitions are handled the same way as for Mylex
1380 DAC960 (see major number 48) except that the limit on
1381 partitions is 15.
1382
1383 74 char SCI bridge
1384 0 = /dev/SCI/0 SCI device 0
1385 1 = /dev/SCI/1 SCI device 1
1386 ...
1387
1388 Currently for Dolphin Interconnect Solutions' PCI-SCI
1389 bridge.
1390
1391 74 block Compaq Intelligent Drive Array, third controller
1392 0 = /dev/ida/c2d0 First logical drive whole disk
1393 16 = /dev/ida/c2d1 Second logical drive whole disk
1394 ...
1395 240 = /dev/ida/c2d15 16th logical drive whole disk
1396
1397 Partitions are handled the same way as for Mylex
1398 DAC960 (see major number 48) except that the limit on
1399 partitions is 15.
1400
1401 75 char Specialix IO8+ serial card
1402 0 = /dev/ttyW0 First IO8+ port, first card
1403 1 = /dev/ttyW1 Second IO8+ port, first card
1404 ...
1405 8 = /dev/ttyW8 First IO8+ port, second card
1406 ...
1407
1408 75 block Compaq Intelligent Drive Array, fourth controller
1409 0 = /dev/ida/c3d0 First logical drive whole disk
1410 16 = /dev/ida/c3d1 Second logical drive whole disk
1411 ...
1412 240 = /dev/ida/c3d15 16th logical drive whole disk
1413
1414 Partitions are handled the same way as for Mylex
1415 DAC960 (see major number 48) except that the limit on
1416 partitions is 15.
1417
1418 76 char Specialix IO8+ serial card - alternate devices
1419 0 = /dev/cuw0 Callout device for ttyW0
1420 1 = /dev/cuw1 Callout device for ttyW1
1421 ...
1422 8 = /dev/cuw8 Callout device for ttyW8
1423 ...
1424
1425 76 block Compaq Intelligent Drive Array, fifth controller
1426 0 = /dev/ida/c4d0 First logical drive whole disk
1427 16 = /dev/ida/c4d1 Second logical drive whole disk
1428 ...
1429 240 = /dev/ida/c4d15 16th logical drive whole disk
1430
1431 Partitions are handled the same way as for Mylex
1432 DAC960 (see major number 48) except that the limit on
1433 partitions is 15.
1434
1435
1436 77 char ComScire Quantum Noise Generator
1437 0 = /dev/qng ComScire Quantum Noise Generator
1438
1439 77 block Compaq Intelligent Drive Array, sixth controller
1440 0 = /dev/ida/c5d0 First logical drive whole disk
1441 16 = /dev/ida/c5d1 Second logical drive whole disk
1442 ...
1443 240 = /dev/ida/c5d15 16th logical drive whole disk
1444
1445 Partitions are handled the same way as for Mylex
1446 DAC960 (see major number 48) except that the limit on
1447 partitions is 15.
1448
1da177e4
LT		 1449 78 char PAM Software's multimodem boards
1450 0 = /dev/ttyM0 First PAM modem
1451 1 = /dev/ttyM1 Second PAM modem
1452 ...
1453
1454 78 block Compaq Intelligent Drive Array, seventh controller
1455 0 = /dev/ida/c6d0 First logical drive whole disk
1456 16 = /dev/ida/c6d1 Second logical drive whole disk
1457 ...
1458 240 = /dev/ida/c6d15 16th logical drive whole disk
1459
1460 Partitions are handled the same way as for Mylex
1461 DAC960 (see major number 48) except that the limit on
1462 partitions is 15.
1463
1da177e4
LT		 1464 79 char PAM Software's multimodem boards - alternate devices
1465 0 = /dev/cum0 Callout device for ttyM0
1466 1 = /dev/cum1 Callout device for ttyM1
1467 ...
1468
5d3f083d 1469 79 block Compaq Intelligent Drive Array, eighth controller
1da177e4
LT		 1470 0 = /dev/ida/c7d0 First logical drive whole disk
1471 16 = /dev/ida/c7d1 Second logical drive whole disk
1472 ...
1473 240 = /dev/ida/c715 16th logical drive whole disk
1474
1475 Partitions are handled the same way as for Mylex
1476 DAC960 (see major number 48) except that the limit on
1477 partitions is 15.
1478
1da177e4
LT		 1479 80 char Photometrics AT200 CCD camera
1480 0 = /dev/at200 Photometrics AT200 CCD camera
1481
1482 80 block I2O hard disk
1483 0 = /dev/i2o/hda First I2O hard disk, whole disk
1484 16 = /dev/i2o/hdb Second I2O hard disk, whole disk
1485 ...
1486 240 = /dev/i2o/hdp 16th I2O hard disk, whole disk
1487
1488 Partitions are handled in the same way as for IDE
1489 disks (see major number 3) except that the limit on
1490 partitions is 15.
1491
1492 81 char video4linux
1493 0 = /dev/video0 Video capture/overlay device
1494 ...
1495 63 = /dev/video63 Video capture/overlay device
1496 64 = /dev/radio0 Radio device
1497 ...
1498 127 = /dev/radio63 Radio device
1499 192 = /dev/vtx0 Teletext device
1500 ...
1501 223 = /dev/vtx31 Teletext device
1502 224 = /dev/vbi0 Vertical blank interrupt
1503 ...
1504 255 = /dev/vbi31 Vertical blank interrupt
1505
1506 81 block I2O hard disk
1507 0 = /dev/i2o/hdq 17th I2O hard disk, whole disk
1508 16 = /dev/i2o/hdr 18th I2O hard disk, whole disk
1509 ...
1510 240 = /dev/i2o/hdaf 32nd I2O hard disk, whole disk
1511
1512 Partitions are handled in the same way as for IDE
1513 disks (see major number 3) except that the limit on
1514 partitions is 15.
1515
1516 82 char WiNRADiO communications receiver card
1517 0 = /dev/winradio0 First WiNRADiO card
1518 1 = /dev/winradio1 Second WiNRADiO card
1519 ...
1520
1521 The driver and documentation may be obtained from
0ea6e611 1522 http://www.winradio.com/
1da177e4
LT		 1523
1524 82 block I2O hard disk
1525 0 = /dev/i2o/hdag 33rd I2O hard disk, whole disk
1526 16 = /dev/i2o/hdah 34th I2O hard disk, whole disk
1527 ...
1528 240 = /dev/i2o/hdav 48th I2O hard disk, whole disk
1529
1530 Partitions are handled in the same way as for IDE
1531 disks (see major number 3) except that the limit on
1532 partitions is 15.
1533
1534 83 char Matrox mga_vid video driver
1535 0 = /dev/mga_vid0 1st video card
1536 1 = /dev/mga_vid1 2nd video card
1537 2 = /dev/mga_vid2 3rd video card
1538 ...
1539 15 = /dev/mga_vid15 16th video card
1540
1541 83 block I2O hard disk
1542 0 = /dev/i2o/hdaw 49th I2O hard disk, whole disk
1543 16 = /dev/i2o/hdax 50th I2O hard disk, whole disk
1544 ...
1545 240 = /dev/i2o/hdbl 64th I2O hard disk, whole disk
1546
1547 Partitions are handled in the same way as for IDE
1548 disks (see major number 3) except that the limit on
1549 partitions is 15.
1550
1551 84 char Ikon 1011[57] Versatec Greensheet Interface
1552 0 = /dev/ihcp0 First Greensheet port
1553 1 = /dev/ihcp1 Second Greensheet port
1554
1555 84 block I2O hard disk
1556 0 = /dev/i2o/hdbm 65th I2O hard disk, whole disk
1557 16 = /dev/i2o/hdbn 66th I2O hard disk, whole disk
1558 ...
1559 240 = /dev/i2o/hdcb 80th I2O hard disk, whole disk
1560
1561 Partitions are handled in the same way as for IDE
1562 disks (see major number 3) except that the limit on
1563 partitions is 15.
1564
1565 85 char Linux/SGI shared memory input queue
1566 0 = /dev/shmiq Master shared input queue
1567 1 = /dev/qcntl0 First device pushed
1568 2 = /dev/qcntl1 Second device pushed
1569 ...
1570
1571 85 block I2O hard disk
1572 0 = /dev/i2o/hdcc 81st I2O hard disk, whole disk
1573 16 = /dev/i2o/hdcd 82nd I2O hard disk, whole disk
1574 ...
1575 240 = /dev/i2o/hdcr 96th I2O hard disk, whole disk
1576
1577 Partitions are handled in the same way as for IDE
1578 disks (see major number 3) except that the limit on
1579 partitions is 15.
1580
1581 86 char SCSI media changer
1582 0 = /dev/sch0 First SCSI media changer
1583 1 = /dev/sch1 Second SCSI media changer
1584 ...
1585
1586 86 block I2O hard disk
1587 0 = /dev/i2o/hdcs 97th I2O hard disk, whole disk
1588 16 = /dev/i2o/hdct 98th I2O hard disk, whole disk
1589 ...
1590 240 = /dev/i2o/hddh 112th I2O hard disk, whole disk
1591
1592 Partitions are handled in the same way as for IDE
1593 disks (see major number 3) except that the limit on
1594 partitions is 15.
1595
1596 87 char Sony Control-A1 stereo control bus
1597 0 = /dev/controla0 First device on chain
1598 1 = /dev/controla1 Second device on chain
1599 ...
1600
1601 87 block I2O hard disk
1602 0 = /dev/i2o/hddi 113rd I2O hard disk, whole disk
1603 16 = /dev/i2o/hddj 114th I2O hard disk, whole disk
1604 ...
1605 240 = /dev/i2o/hddx 128th I2O hard disk, whole disk
1606
1607 Partitions are handled in the same way as for IDE
1608 disks (see major number 3) except that the limit on
1609 partitions is 15.
1610
1611 88 char COMX synchronous serial card
1612 0 = /dev/comx0 COMX channel 0
1613 1 = /dev/comx1 COMX channel 1
1614 ...
1615
1616 88 block Seventh IDE hard disk/CD-ROM interface
1617 0 = /dev/hdm Master: whole disk (or CD-ROM)
1618 64 = /dev/hdn Slave: whole disk (or CD-ROM)
1619
1620 Partitions are handled the same way as for the first
1621 interface (see major number 3).
1622
1623 89 char I2C bus interface
1624 0 = /dev/i2c-0 First I2C adapter
1625 1 = /dev/i2c-1 Second I2C adapter
1626 ...
1627
1628 89 block Eighth IDE hard disk/CD-ROM interface
1629 0 = /dev/hdo Master: whole disk (or CD-ROM)
1630 64 = /dev/hdp Slave: whole disk (or CD-ROM)
1631
1632 Partitions are handled the same way as for the first
1633 interface (see major number 3).
1634
1635 90 char Memory Technology Device (RAM, ROM, Flash)
1636 0 = /dev/mtd0 First MTD (rw)
1637 1 = /dev/mtdr0 First MTD (ro)
1638 ...
1639 30 = /dev/mtd15 16th MTD (rw)
1640 31 = /dev/mtdr15 16th MTD (ro)
1641
1642 90 block Ninth IDE hard disk/CD-ROM interface
1643 0 = /dev/hdq Master: whole disk (or CD-ROM)
1644 64 = /dev/hdr Slave: whole disk (or CD-ROM)
1645
1646 Partitions are handled the same way as for the first
1647 interface (see major number 3).
1648
1649 91 char CAN-Bus devices
1650 0 = /dev/can0 First CAN-Bus controller
1651 1 = /dev/can1 Second CAN-Bus controller
1652 ...
1653
1654 91 block Tenth IDE hard disk/CD-ROM interface
1655 0 = /dev/hds Master: whole disk (or CD-ROM)
1656 64 = /dev/hdt Slave: whole disk (or CD-ROM)
1657
1658 Partitions are handled the same way as for the first
1659 interface (see major number 3).
1660
1661 92 char Reserved for ith Kommunikationstechnik MIC ISDN card
1662
1663 92 block PPDD encrypted disk driver
1664 0 = /dev/ppdd0 First encrypted disk
1665 1 = /dev/ppdd1 Second encrypted disk
1666 ...
1667
1668 Partitions are handled in the same way as for IDE
1669 disks (see major number 3) except that the limit on
1670 partitions is 15.
1671
04c860c1 1672 93 char
1da177e4
LT		 1673
1674 93 block NAND Flash Translation Layer filesystem
1675 0 = /dev/nftla First NFTL layer
1676 16 = /dev/nftlb Second NFTL layer
1677 ...
1678 240 = /dev/nftlp 16th NTFL layer
1679
04c860c1 1680 94 char
1da177e4 1681
30aaa5c6 1682 94 block IBM S/390 DASD block storage
1da177e4
LT		 1683 0 = /dev/dasda First DASD device, major
1684 1 = /dev/dasda1 First DASD device, block 1
1685 2 = /dev/dasda2 First DASD device, block 2
1686 3 = /dev/dasda3 First DASD device, block 3
1687 4 = /dev/dasdb Second DASD device, major
1688 5 = /dev/dasdb1 Second DASD device, block 1
1689 6 = /dev/dasdb2 Second DASD device, block 2
1690 7 = /dev/dasdb3 Second DASD device, block 3
1691 ...
1692
1693 95 char IP filter
1694 0 = /dev/ipl Filter control device/log file
1695 1 = /dev/ipnat NAT control device/log file
1696 2 = /dev/ipstate State information log file
1697 3 = /dev/ipauth Authentication control device/log file
30aaa5c6 1698 ...
1da177e4
LT		 1699
1700 96 char Parallel port ATAPI tape devices
1701 0 = /dev/pt0 First parallel port ATAPI tape
1702 1 = /dev/pt1 Second parallel port ATAPI tape
1703 ...
1704 128 = /dev/npt0 First p.p. ATAPI tape, no rewind
1705 129 = /dev/npt1 Second p.p. ATAPI tape, no rewind
1706 ...
1707
30aaa5c6 1708 96 block Inverse NAND Flash Translation Layer
1da177e4
LT		 1709 0 = /dev/inftla First INFTL layer
1710 16 = /dev/inftlb Second INFTL layer
1711 ...
1712 240 = /dev/inftlp 16th INTFL layer
1713
1714 97 char Parallel port generic ATAPI interface
1715 0 = /dev/pg0 First parallel port ATAPI device
1716 1 = /dev/pg1 Second parallel port ATAPI device
1717 2 = /dev/pg2 Third parallel port ATAPI device
1718 3 = /dev/pg3 Fourth parallel port ATAPI device
1719
1720 These devices support the same API as the generic SCSI
1721 devices.
1722
1da177e4
LT		 1723 98 char Control and Measurement Device (comedi)
1724 0 = /dev/comedi0 First comedi device
1725 1 = /dev/comedi1 Second comedi device
1726 ...
1727
0ea6e611 1728 See http://stm.lbl.gov/comedi.
1da177e4
LT		 1729
1730 98 block User-mode virtual block device
1731 0 = /dev/ubda First user-mode block device
1732 16 = /dev/udbb Second user-mode block device
1733 ...
1734
1735 Partitions are handled in the same way as for IDE
1736 disks (see major number 3) except that the limit on
1737 partitions is 15.
1738
1739 This device is used by the user-mode virtual kernel port.
1740
1741 99 char Raw parallel ports
1742 0 = /dev/parport0 First parallel port
1743 1 = /dev/parport1 Second parallel port
1744 ...
1745
1746 99 block JavaStation flash disk
1747 0 = /dev/jsfd JavaStation flash disk
1748
1749100 char Telephony for Linux
1750 0 = /dev/phone0 First telephony device
1751 1 = /dev/phone1 Second telephony device
1752 ...
1753
1754101 char Motorola DSP 56xxx board
1755 0 = /dev/mdspstat Status information
1756 1 = /dev/mdsp1 First DSP board I/O controls
1757 ...
1758 16 = /dev/mdsp16 16th DSP board I/O controls
1759
1760101 block AMI HyperDisk RAID controller
1761 0 = /dev/amiraid/ar0 First array whole disk
1762 16 = /dev/amiraid/ar1 Second array whole disk
1763 ...
1764 240 = /dev/amiraid/ar15 16th array whole disk
1765
1766 For each device, partitions are added as:
1767 0 = /dev/amiraid/ar? Whole disk
1768 1 = /dev/amiraid/ar?p1 First partition
1769 2 = /dev/amiraid/ar?p2 Second partition
1770 ...
1771 15 = /dev/amiraid/ar?p15 15th partition
1772
04c860c1 1773102 char
1da177e4
LT		 1774
1775102 block Compressed block device
1776 0 = /dev/cbd/a First compressed block device, whole device
1777 16 = /dev/cbd/b Second compressed block device, whole device
1778 ...
1779 240 = /dev/cbd/p 16th compressed block device, whole device
1780
1781 Partitions are handled in the same way as for IDE
1782 disks (see major number 3) except that the limit on
1783 partitions is 15.
1784
1785103 char Arla network file system
1786 0 = /dev/nnpfs0 First NNPFS device
1787 1 = /dev/nnpfs1 Second NNPFS device
1788
1789 Arla is a free clone of the Andrew File System, AFS.
1790 The NNPFS device gives user mode filesystem
1791 implementations a kernel presence for caching and easy
1792 mounting. For more information about the project,
1793 write to <arla-drinkers@stacken.kth.se> or see
1794 http://www.stacken.kth.se/project/arla/
1795
1796103 block Audit device
1797 0 = /dev/audit Audit device
1798
1799104 char Flash BIOS support
1800
1801104 block Compaq Next Generation Drive Array, first controller
1802 0 = /dev/cciss/c0d0 First logical drive, whole disk
1803 16 = /dev/cciss/c0d1 Second logical drive, whole disk
1804 ...
1805 240 = /dev/cciss/c0d15 16th logical drive, whole disk
1806
1807 Partitions are handled the same way as for Mylex
1808 DAC960 (see major number 48) except that the limit on
1809 partitions is 15.
1810
1811105 char Comtrol VS-1000 serial controller
1812 0 = /dev/ttyV0 First VS-1000 port
1813 1 = /dev/ttyV1 Second VS-1000 port
1814 ...
1815
1816105 block Compaq Next Generation Drive Array, second controller
1817 0 = /dev/cciss/c1d0 First logical drive, whole disk
1818 16 = /dev/cciss/c1d1 Second logical drive, whole disk
1819 ...
1820 240 = /dev/cciss/c1d15 16th logical drive, whole disk
1821
1822 Partitions are handled the same way as for Mylex
1823 DAC960 (see major number 48) except that the limit on
1824 partitions is 15.
1825
1826106 char Comtrol VS-1000 serial controller - alternate devices
1827 0 = /dev/cuv0 First VS-1000 port
1828 1 = /dev/cuv1 Second VS-1000 port
1829 ...
1830
1831106 block Compaq Next Generation Drive Array, third controller
1832 0 = /dev/cciss/c2d0 First logical drive, whole disk
1833 16 = /dev/cciss/c2d1 Second logical drive, whole disk
1834 ...
1835 240 = /dev/cciss/c2d15 16th logical drive, whole disk
1836
1837 Partitions are handled the same way as for Mylex
1838 DAC960 (see major number 48) except that the limit on
1839 partitions is 15.
1840
1841107 char 3Dfx Voodoo Graphics device
1842 0 = /dev/3dfx Primary 3Dfx graphics device
1843
1844107 block Compaq Next Generation Drive Array, fourth controller
1845 0 = /dev/cciss/c3d0 First logical drive, whole disk
1846 16 = /dev/cciss/c3d1 Second logical drive, whole disk
1847 ...
1848 240 = /dev/cciss/c3d15 16th logical drive, whole disk
1849
1850 Partitions are handled the same way as for Mylex
1851 DAC960 (see major number 48) except that the limit on
1852 partitions is 15.
1853
1854108 char Device independent PPP interface
1855 0 = /dev/ppp Device independent PPP interface
1856
1857108 block Compaq Next Generation Drive Array, fifth controller
1858 0 = /dev/cciss/c4d0 First logical drive, whole disk
1859 16 = /dev/cciss/c4d1 Second logical drive, whole disk
1860 ...
1861 240 = /dev/cciss/c4d15 16th logical drive, whole disk
1862
1863 Partitions are handled the same way as for Mylex
1864 DAC960 (see major number 48) except that the limit on
1865 partitions is 15.
1866
1867109 char Reserved for logical volume manager
1868
1869109 block Compaq Next Generation Drive Array, sixth controller
1870 0 = /dev/cciss/c5d0 First logical drive, whole disk
1871 16 = /dev/cciss/c5d1 Second logical drive, whole disk
1872 ...
1873 240 = /dev/cciss/c5d15 16th logical drive, whole disk
1874
1875 Partitions are handled the same way as for Mylex
1876 DAC960 (see major number 48) except that the limit on
1877 partitions is 15.
1878
1879110 char miroMEDIA Surround board
1880 0 = /dev/srnd0 First miroMEDIA Surround board
1881 1 = /dev/srnd1 Second miroMEDIA Surround board
1882 ...
1883
1884110 block Compaq Next Generation Drive Array, seventh controller
1885 0 = /dev/cciss/c6d0 First logical drive, whole disk
1886 16 = /dev/cciss/c6d1 Second logical drive, whole disk
1887 ...
1888 240 = /dev/cciss/c6d15 16th logical drive, whole disk
1889
1890 Partitions are handled the same way as for Mylex
1891 DAC960 (see major number 48) except that the limit on
1892 partitions is 15.
1893
04c860c1 1894111 char
1da177e4 1895
5d3f083d 1896111 block Compaq Next Generation Drive Array, eighth controller
1da177e4
LT		 1897 0 = /dev/cciss/c7d0 First logical drive, whole disk
1898 16 = /dev/cciss/c7d1 Second logical drive, whole disk
1899 ...
1900 240 = /dev/cciss/c7d15 16th logical drive, whole disk
1901
1902 Partitions are handled the same way as for Mylex
1903 DAC960 (see major number 48) except that the limit on
1904 partitions is 15.
1905
1906112 char ISI serial card
1907 0 = /dev/ttyM0 First ISI port
1908 1 = /dev/ttyM1 Second ISI port
1909 ...
1910
1911 There is currently a device-naming conflict between
1912 these and PAM multimodems (major 78).
1913
1914112 block IBM iSeries virtual disk
1915 0 = /dev/iseries/vda First virtual disk, whole disk
1916 8 = /dev/iseries/vdb Second virtual disk, whole disk
1917 ...
1918 200 = /dev/iseries/vdz 26th virtual disk, whole disk
1919 208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1920 ...
1921 248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1922
1923 Partitions are handled in the same way as for IDE
1924 disks (see major number 3) except that the limit on
1925 partitions is 7.
1926
1927113 char ISI serial card - alternate devices
1928 0 = /dev/cum0 Callout device for ttyM0
1929 1 = /dev/cum1 Callout device for ttyM1
1930 ...
1931
1932113 block IBM iSeries virtual CD-ROM
1da177e4
LT		 1933 0 = /dev/iseries/vcda First virtual CD-ROM
1934 1 = /dev/iseries/vcdb Second virtual CD-ROM
1935 ...
1936
1937114 char Picture Elements ISE board
1938 0 = /dev/ise0 First ISE board
1939 1 = /dev/ise1 Second ISE board
1940 ...
1941 128 = /dev/isex0 Control node for first ISE board
1942 129 = /dev/isex1 Control node for second ISE board
1943 ...
1944
1945 The ISE board is an embedded computer, optimized for
1946 image processing. The /dev/iseN nodes are the general
1947 I/O access to the board, the /dev/isex0 nodes command
1948 nodes used to control the board.
1949
1950114 block IDE BIOS powered software RAID interfaces such as the
1951 Promise Fastrak
1952
1953 0 = /dev/ataraid/d0
1954 1 = /dev/ataraid/d0p1
1955 2 = /dev/ataraid/d0p2
1956 ...
1957 16 = /dev/ataraid/d1
1958 17 = /dev/ataraid/d1p1
1959 18 = /dev/ataraid/d1p2
1960 ...
1961 255 = /dev/ataraid/d15p15
1962
1963 Partitions are handled in the same way as for IDE
1964 disks (see major number 3) except that the limit on
1965 partitions is 15.
1966
1967115 char TI link cable devices (115 was formerly the console driver speaker)
1968 0 = /dev/tipar0 Parallel cable on first parallel port
1969 ...
1970 7 = /dev/tipar7 Parallel cable on seventh parallel port
1971
1972 8 = /dev/tiser0 Serial cable on first serial port
1973 ...
1974 15 = /dev/tiser7 Serial cable on seventh serial port
1975
1976 16 = /dev/tiusb0 First USB cable
1977 ...
1978 47 = /dev/tiusb31 32nd USB cable
1979
1980115 block NetWare (NWFS) Devices (0-255)
1981
1982 The NWFS (NetWare) devices are used to present a
1983 collection of NetWare Mirror Groups or NetWare
1984 Partitions as a logical storage segment for
1985 use in mounting NetWare volumes. A maximum of
1986 256 NetWare volumes can be supported in a single
1987 machine.
1988
0ea6e611 1989 http://cgfa.telepac.pt/ftp2/kernel.org/linux/kernel/people/jmerkey/nwfs/
1da177e4
LT		 1990
1991 0 = /dev/nwfs/v0 First NetWare (NWFS) Logical Volume
1992 1 = /dev/nwfs/v1 Second NetWare (NWFS) Logical Volume
1993 2 = /dev/nwfs/v2 Third NetWare (NWFS) Logical Volume
1994 ...
1995 255 = /dev/nwfs/v255 Last NetWare (NWFS) Logical Volume
1996
1997116 char Advanced Linux Sound Driver (ALSA)
1998
1999116 block MicroMemory battery backed RAM adapter (NVRAM)
992caacf 2000 Supports 16 boards, 15 partitions each.
1da177e4
LT		 2001 Requested by neilb at cse.unsw.edu.au.
2002
2003 0 = /dev/umem/d0 Whole of first board
2004 1 = /dev/umem/d0p1 First partition of first board
2005 2 = /dev/umem/d0p2 Second partition of first board
2006 15 = /dev/umem/d0p15 15th partition of first board
2007
2008 16 = /dev/umem/d1 Whole of second board
2009 17 = /dev/umem/d1p1 First partition of second board
2010 ...
2011 255= /dev/umem/d15p15 15th partition of 16th board.
2012
2013117 char COSA/SRP synchronous serial card
2014 0 = /dev/cosa0c0 1st board, 1st channel
2015 1 = /dev/cosa0c1 1st board, 2nd channel
2016 ...
2017 16 = /dev/cosa1c0 2nd board, 1st channel
2018 17 = /dev/cosa1c1 2nd board, 2nd channel
2019 ...
2020
2021117 block Enterprise Volume Management System (EVMS)
2022
2023 The EVMS driver uses a layered, plug-in model to provide
2024 unparalleled flexibility and extensibility in managing
2025 storage. This allows for easy expansion or customization
2026 of various levels of volume management. Requested by
2027 Mark Peloquin (peloquin at us.ibm.com).
2028
2029 Note: EVMS populates and manages all the devnodes in
2030 /dev/evms.
2031
2032 http://sf.net/projects/evms
2033
2034 0 = /dev/evms/block_device EVMS block device
2035 1 = /dev/evms/legacyname1 First EVMS legacy device
2036 2 = /dev/evms/legacyname2 Second EVMS legacy device
2037 ...
2038 Both ranges can grow (down or up) until they meet.
2039 ...
2040 254 = /dev/evms/EVMSname2 Second EVMS native device
2041 255 = /dev/evms/EVMSname1 First EVMS native device
2042
2043 Note: legacyname(s) are derived from the normal legacy
2044 device names. For example, /dev/hda5 would become
2045 /dev/evms/hda5.
2046
2047118 char IBM Cryptographic Accelerator
2048 0 = /dev/ica Virtual interface to all IBM Crypto Accelerators
2049 1 = /dev/ica0 IBMCA Device 0
2050 2 = /dev/ica1 IBMCA Device 1
2051 ...
2052
2053119 char VMware virtual network control
04c860c1
AC		 2054 0 = /dev/vnet0 1st virtual network
2055 1 = /dev/vnet1 2nd virtual network
1da177e4
LT		 2056 ...
2057
2058120-127 char LOCAL/EXPERIMENTAL USE
30aaa5c6 2059
1da177e4
LT		 2060120-127 block LOCAL/EXPERIMENTAL USE
2061 Allocated for local/experimental use. For devices not
2062 assigned official numbers, these ranges should be
2063 used in order to avoid conflicting with future assignments.
2064
2065128-135 char Unix98 PTY masters
2066
2067 These devices should not have corresponding device
2068 nodes; instead they should be accessed through the
2069 /dev/ptmx cloning interface.
2070
1da177e4
LT		 2071128 block SCSI disk devices (128-143)
2072 0 = /dev/sddy 129th SCSI disk whole disk
2073 16 = /dev/sddz 130th SCSI disk whole disk
2074 32 = /dev/sdea 131th SCSI disk whole disk
2075 ...
2076 240 = /dev/sden 144th SCSI disk whole disk
2077
2078 Partitions are handled in the same way as for IDE
2079 disks (see major number 3) except that the limit on
2080 partitions is 15.
2081
1da177e4
LT		 2082129 block SCSI disk devices (144-159)
2083 0 = /dev/sdeo 145th SCSI disk whole disk
2084 16 = /dev/sdep 146th SCSI disk whole disk
2085 32 = /dev/sdeq 147th SCSI disk whole disk
2086 ...
2087 240 = /dev/sdfd 160th SCSI disk whole disk
2088
2089 Partitions are handled in the same way as for IDE
2090 disks (see major number 3) except that the limit on
2091 partitions is 15.
2092
2093130 char (Misc devices)
2094
2095130 block SCSI disk devices (160-175)
2096 0 = /dev/sdfe 161st SCSI disk whole disk
2097 16 = /dev/sdff 162nd SCSI disk whole disk
2098 32 = /dev/sdfg 163rd SCSI disk whole disk
2099 ...
2100 240 = /dev/sdft 176th SCSI disk whole disk
2101
2102 Partitions are handled in the same way as for IDE
2103 disks (see major number 3) except that the limit on
2104 partitions is 15.
2105
2106131 block SCSI disk devices (176-191)
2107 0 = /dev/sdfu 177th SCSI disk whole disk
2108 16 = /dev/sdfv 178th SCSI disk whole disk
2109 32 = /dev/sdfw 179th SCSI disk whole disk
2110 ...
2111 240 = /dev/sdgj 192nd SCSI disk whole disk
2112
2113 Partitions are handled in the same way as for IDE
2114 disks (see major number 3) except that the limit on
2115 partitions is 15.
2116
1da177e4
LT		 2117132 block SCSI disk devices (192-207)
2118 0 = /dev/sdgk 193rd SCSI disk whole disk
2119 16 = /dev/sdgl 194th SCSI disk whole disk
2120 32 = /dev/sdgm 195th SCSI disk whole disk
2121 ...
2122 240 = /dev/sdgz 208th SCSI disk whole disk
2123
2124 Partitions are handled in the same way as for IDE
2125 disks (see major number 3) except that the limit on
2126 partitions is 15.
2127
1da177e4
LT		 2128133 block SCSI disk devices (208-223)
2129 0 = /dev/sdha 209th SCSI disk whole disk
2130 16 = /dev/sdhb 210th SCSI disk whole disk
2131 32 = /dev/sdhc 211th SCSI disk whole disk
2132 ...
2133 240 = /dev/sdhp 224th SCSI disk whole disk
2134
2135 Partitions are handled in the same way as for IDE
2136 disks (see major number 3) except that the limit on
2137 partitions is 15.
2138
1da177e4
LT		 2139134 block SCSI disk devices (224-239)
2140 0 = /dev/sdhq 225th SCSI disk whole disk
2141 16 = /dev/sdhr 226th SCSI disk whole disk
2142 32 = /dev/sdhs 227th SCSI disk whole disk
2143 ...
2144 240 = /dev/sdif 240th SCSI disk whole disk
2145
2146 Partitions are handled in the same way as for IDE
2147 disks (see major number 3) except that the limit on
2148 partitions is 15.
2149
1da177e4
LT		 2150135 block SCSI disk devices (240-255)
2151 0 = /dev/sdig 241st SCSI disk whole disk
2152 16 = /dev/sdih 242nd SCSI disk whole disk
2153 32 = /dev/sdih 243rd SCSI disk whole disk
2154 ...
2155 240 = /dev/sdiv 256th SCSI disk whole disk
2156
2157 Partitions are handled in the same way as for IDE
2158 disks (see major number 3) except that the limit on
2159 partitions is 15.
2160
1da177e4
LT		 2161136-143 char Unix98 PTY slaves
2162 0 = /dev/pts/0 First Unix98 pseudo-TTY
01dd2fbf 2163 1 = /dev/pts/1 Second Unix98 pseudo-TTY
1da177e4
LT		 2164 ...
2165
2166 These device nodes are automatically generated with
2167 the proper permissions and modes by mounting the
2168 devpts filesystem onto /dev/pts with the appropriate
2169 mount options (distribution dependent, however, on
2170 *most* distributions the appropriate options are
2171 "mode=0620,gid=<gid of the "tty" group>".)
2172
2173136 block Mylex DAC960 PCI RAID controller; ninth controller
2174 0 = /dev/rd/c8d0 First disk, whole disk
2175 8 = /dev/rd/c8d1 Second disk, whole disk
2176 ...
2177 248 = /dev/rd/c8d31 32nd disk, whole disk
2178
2179 Partitions are handled as for major 48.
2180
2181137 block Mylex DAC960 PCI RAID controller; tenth controller
2182 0 = /dev/rd/c9d0 First disk, whole disk
2183 8 = /dev/rd/c9d1 Second disk, whole disk
2184 ...
2185 248 = /dev/rd/c9d31 32nd disk, whole disk
2186
2187 Partitions are handled as for major 48.
2188
2189138 block Mylex DAC960 PCI RAID controller; eleventh controller
2190 0 = /dev/rd/c10d0 First disk, whole disk
2191 8 = /dev/rd/c10d1 Second disk, whole disk
2192 ...
2193 248 = /dev/rd/c10d31 32nd disk, whole disk
2194
2195 Partitions are handled as for major 48.
2196
2197139 block Mylex DAC960 PCI RAID controller; twelfth controller
2198 0 = /dev/rd/c11d0 First disk, whole disk
2199 8 = /dev/rd/c11d1 Second disk, whole disk
2200 ...
2201 248 = /dev/rd/c11d31 32nd disk, whole disk
2202
2203 Partitions are handled as for major 48.
2204
2205140 block Mylex DAC960 PCI RAID controller; thirteenth controller
2206 0 = /dev/rd/c12d0 First disk, whole disk
2207 8 = /dev/rd/c12d1 Second disk, whole disk
2208 ...
2209 248 = /dev/rd/c12d31 32nd disk, whole disk
2210
2211 Partitions are handled as for major 48.
2212
2213141 block Mylex DAC960 PCI RAID controller; fourteenth controller
2214 0 = /dev/rd/c13d0 First disk, whole disk
2215 8 = /dev/rd/c13d1 Second disk, whole disk
2216 ...
2217 248 = /dev/rd/c13d31 32nd disk, whole disk
2218
2219 Partitions are handled as for major 48.
2220
2221142 block Mylex DAC960 PCI RAID controller; fifteenth controller
2222 0 = /dev/rd/c14d0 First disk, whole disk
2223 8 = /dev/rd/c14d1 Second disk, whole disk
2224 ...
2225 248 = /dev/rd/c14d31 32nd disk, whole disk
2226
2227 Partitions are handled as for major 48.
2228
2229143 block Mylex DAC960 PCI RAID controller; sixteenth controller
2230 0 = /dev/rd/c15d0 First disk, whole disk
2231 8 = /dev/rd/c15d1 Second disk, whole disk
2232 ...
2233 248 = /dev/rd/c15d31 32nd disk, whole disk
2234
2235 Partitions are handled as for major 48.
2236
2237144 char Encapsulated PPP
2238 0 = /dev/pppox0 First PPP over Ethernet
2239 ...
2240 63 = /dev/pppox63 64th PPP over Ethernet
2241
2242 This is primarily used for ADSL.
2243
2244 The SST 5136-DN DeviceNet interface driver has been
2245 relocated to major 183 due to an unfortunate conflict.
2246
2247144 block Expansion Area #1 for more non-device (e.g. NFS) mounts
2248 0 = mounted device 256
2249 255 = mounted device 511
2250
2251145 char SAM9407-based soundcard
2252 0 = /dev/sam0_mixer
2253 1 = /dev/sam0_sequencer
2254 2 = /dev/sam0_midi00
2255 3 = /dev/sam0_dsp
2256 4 = /dev/sam0_audio
2257 6 = /dev/sam0_sndstat
2258 18 = /dev/sam0_midi01
2259 34 = /dev/sam0_midi02
2260 50 = /dev/sam0_midi03
2261 64 = /dev/sam1_mixer
2262 ...
2263 128 = /dev/sam2_mixer
2264 ...
2265 192 = /dev/sam3_mixer
2266 ...
2267
2268 Device functions match OSS, but offer a number of
2269 addons, which are sam9407 specific. OSS can be
2270 operated simultaneously, taking care of the codec.
2271
2272145 block Expansion Area #2 for more non-device (e.g. NFS) mounts
2273 0 = mounted device 512
2274 255 = mounted device 767
2275
2276146 char SYSTRAM SCRAMNet mirrored-memory network
2277 0 = /dev/scramnet0 First SCRAMNet device
2278 1 = /dev/scramnet1 Second SCRAMNet device
2279 ...
2280
2281146 block Expansion Area #3 for more non-device (e.g. NFS) mounts
2282 0 = mounted device 768
2283 255 = mounted device 1023
2284
2285147 char Aureal Semiconductor Vortex Audio device
2286 0 = /dev/aureal0 First Aureal Vortex
2287 1 = /dev/aureal1 Second Aureal Vortex
2288 ...
2289
2290147 block Distributed Replicated Block Device (DRBD)
2291 0 = /dev/drbd0 First DRBD device
2292 1 = /dev/drbd1 Second DRBD device
2293 ...
2294
2295148 char Technology Concepts serial card
2296 0 = /dev/ttyT0 First TCL port
2297 1 = /dev/ttyT1 Second TCL port
2298 ...
2299
2300149 char Technology Concepts serial card - alternate devices
2301 0 = /dev/cut0 Callout device for ttyT0
2302 1 = /dev/cut0 Callout device for ttyT1
2303 ...
2304
2305150 char Real-Time Linux FIFOs
2306 0 = /dev/rtf0 First RTLinux FIFO
2307 1 = /dev/rtf1 Second RTLinux FIFO
2308 ...
2309
2310151 char DPT I2O SmartRaid V controller
2311 0 = /dev/dpti0 First DPT I2O adapter
2312 1 = /dev/dpti1 Second DPT I2O adapter
2313 ...
2314
2315152 char EtherDrive Control Device
2316 0 = /dev/etherd/ctl Connect/Disconnect an EtherDrive
2317 1 = /dev/etherd/err Monitor errors
2318 2 = /dev/etherd/raw Raw AoE packet monitor
2319
2320152 block EtherDrive Block Devices
2321 0 = /dev/etherd/0 EtherDrive 0
2322 ...
2323 255 = /dev/etherd/255 EtherDrive 255
2324
2325153 char SPI Bus Interface (sometimes referred to as MicroWire)
2326 0 = /dev/spi0 First SPI device on the bus
2327 1 = /dev/spi1 Second SPI device on the bus
2328 ...
2329 15 = /dev/spi15 Sixteenth SPI device on the bus
2330
2331153 block Enhanced Metadisk RAID (EMD) storage units
2332 0 = /dev/emd/0 First unit
2333 1 = /dev/emd/0p1 Partition 1 on First unit
2334 2 = /dev/emd/0p2 Partition 2 on First unit
2335 ...
2336 15 = /dev/emd/0p15 Partition 15 on First unit
2337
2338 16 = /dev/emd/1 Second unit
2339 32 = /dev/emd/2 Third unit
2340 ...
2341 240 = /dev/emd/15 Sixteenth unit
2342
2343 Partitions are handled in the same way as for IDE
2344 disks (see major number 3) except that the limit on
2345 partitions is 15.
2346
2347154 char Specialix RIO serial card
2348 0 = /dev/ttySR0 First RIO port
2349 ...
2350 255 = /dev/ttySR255 256th RIO port
2351
2352155 char Specialix RIO serial card - alternate devices
2353 0 = /dev/cusr0 Callout device for ttySR0
2354 ...
2355 255 = /dev/cusr255 Callout device for ttySR255
2356
2357156 char Specialix RIO serial card
2358 0 = /dev/ttySR256 257th RIO port
2359 ...
2360 255 = /dev/ttySR511 512th RIO port
2361
2362157 char Specialix RIO serial card - alternate devices
2363 0 = /dev/cusr256 Callout device for ttySR256
2364 ...
2365 255 = /dev/cusr511 Callout device for ttySR511
2366
2367158 char Dialogic GammaLink fax driver
2368 0 = /dev/gfax0 GammaLink channel 0
2369 1 = /dev/gfax1 GammaLink channel 1
2370 ...
2371
2372159 char RESERVED
30aaa5c6 2373
1da177e4
LT		 2374159 block RESERVED
2375
2376160 char General Purpose Instrument Bus (GPIB)
2377 0 = /dev/gpib0 First GPIB bus
2378 1 = /dev/gpib1 Second GPIB bus
2379 ...
2380
2381160 block Carmel 8-port SATA Disks on First Controller
2382 0 = /dev/carmel/0 SATA disk 0 whole disk
2383 1 = /dev/carmel/0p1 SATA disk 0 partition 1
2384 ...
2385 31 = /dev/carmel/0p31 SATA disk 0 partition 31
2386
2387 32 = /dev/carmel/1 SATA disk 1 whole disk
2388 64 = /dev/carmel/2 SATA disk 2 whole disk
2389 ...
2390 224 = /dev/carmel/7 SATA disk 7 whole disk
2391
2392 Partitions are handled in the same way as for IDE
2393 disks (see major number 3) except that the limit on
2394 partitions is 31.
2395
2396161 char IrCOMM devices (IrDA serial/parallel emulation)
2397 0 = /dev/ircomm0 First IrCOMM device
2398 1 = /dev/ircomm1 Second IrCOMM device
2399 ...
2400 16 = /dev/irlpt0 First IrLPT device
2401 17 = /dev/irlpt1 Second IrLPT device
2402 ...
2403
2404161 block Carmel 8-port SATA Disks on Second Controller
2405 0 = /dev/carmel/8 SATA disk 8 whole disk
2406 1 = /dev/carmel/8p1 SATA disk 8 partition 1
2407 ...
2408 31 = /dev/carmel/8p31 SATA disk 8 partition 31
2409
2410 32 = /dev/carmel/9 SATA disk 9 whole disk
2411 64 = /dev/carmel/10 SATA disk 10 whole disk
2412 ...
2413 224 = /dev/carmel/15 SATA disk 15 whole disk
2414
2415 Partitions are handled in the same way as for IDE
2416 disks (see major number 3) except that the limit on
30aaa5c6 2417 partitions is 31.
1da177e4
LT		 2418
2419162 char Raw block device interface
2420 0 = /dev/rawctl Raw I/O control device
2421 1 = /dev/raw/raw1 First raw I/O device
2422 2 = /dev/raw/raw2 Second raw I/O device
2423 ...
2424
04c860c1 2425163 char
1da177e4
LT		 2426
2427164 char Chase Research AT/PCI-Fast serial card
2428 0 = /dev/ttyCH0 AT/PCI-Fast board 0, port 0
2429 ...
2430 15 = /dev/ttyCH15 AT/PCI-Fast board 0, port 15
2431 16 = /dev/ttyCH16 AT/PCI-Fast board 1, port 0
2432 ...
2433 31 = /dev/ttyCH31 AT/PCI-Fast board 1, port 15
2434 32 = /dev/ttyCH32 AT/PCI-Fast board 2, port 0
2435 ...
2436 47 = /dev/ttyCH47 AT/PCI-Fast board 2, port 15
2437 48 = /dev/ttyCH48 AT/PCI-Fast board 3, port 0
2438 ...
2439 63 = /dev/ttyCH63 AT/PCI-Fast board 3, port 15
2440
2441165 char Chase Research AT/PCI-Fast serial card - alternate devices
2442 0 = /dev/cuch0 Callout device for ttyCH0
2443 ...
2444 63 = /dev/cuch63 Callout device for ttyCH63
2445
2446166 char ACM USB modems
2447 0 = /dev/ttyACM0 First ACM modem
2448 1 = /dev/ttyACM1 Second ACM modem
2449 ...
2450
2451167 char ACM USB modems - alternate devices
2452 0 = /dev/cuacm0 Callout device for ttyACM0
2453 1 = /dev/cuacm1 Callout device for ttyACM1
2454 ...
2455
2456168 char Eracom CSA7000 PCI encryption adaptor
2457 0 = /dev/ecsa0 First CSA7000
2458 1 = /dev/ecsa1 Second CSA7000
2459 ...
2460
2461169 char Eracom CSA8000 PCI encryption adaptor
2462 0 = /dev/ecsa8-0 First CSA8000
2463 1 = /dev/ecsa8-1 Second CSA8000
2464 ...
2465
2466170 char AMI MegaRAC remote access controller
2467 0 = /dev/megarac0 First MegaRAC card
2468 1 = /dev/megarac1 Second MegaRAC card
2469 ...
2470
2471171 char Reserved for IEEE 1394 (Firewire)
2472
1da177e4
LT		 2473172 char Moxa Intellio serial card
2474 0 = /dev/ttyMX0 First Moxa port
2475 1 = /dev/ttyMX1 Second Moxa port
2476 ...
2477 127 = /dev/ttyMX127 128th Moxa port
2478 128 = /dev/moxactl Moxa control port
2479
2480173 char Moxa Intellio serial card - alternate devices
2481 0 = /dev/cumx0 Callout device for ttyMX0
2482 1 = /dev/cumx1 Callout device for ttyMX1
2483 ...
2484 127 = /dev/cumx127 Callout device for ttyMX127
2485
2486174 char SmartIO serial card
2487 0 = /dev/ttySI0 First SmartIO port
2488 1 = /dev/ttySI1 Second SmartIO port
2489 ...
2490
2491175 char SmartIO serial card - alternate devices
2492 0 = /dev/cusi0 Callout device for ttySI0
2493 1 = /dev/cusi1 Callout device for ttySI1
2494 ...
2495
2496176 char nCipher nFast PCI crypto accelerator
2497 0 = /dev/nfastpci0 First nFast PCI device
2498 1 = /dev/nfastpci1 First nFast PCI device
2499 ...
2500
2501177 char TI PCILynx memory spaces
2502 0 = /dev/pcilynx/aux0 AUX space of first PCILynx card
2503 ...
2504 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2505 16 = /dev/pcilynx/rom0 ROM space of first PCILynx card
2506 ...
2507 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2508 32 = /dev/pcilynx/ram0 RAM space of first PCILynx card
2509 ...
2510 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2511
2512178 char Giganet cLAN1xxx virtual interface adapter
2513 0 = /dev/clanvi0 First cLAN adapter
2514 1 = /dev/clanvi1 Second cLAN adapter
2515 ...
2516
04c860c1
AC		 2517179 block MMC block devices
2518 0 = /dev/mmcblk0 First SD/MMC card
2519 1 = /dev/mmcblk0p1 First partition on first MMC card
2520 8 = /dev/mmcblk1 Second SD/MMC card
2521 ...
2522
1da177e4
LT		 2523179 char CCube DVXChip-based PCI products
2524 0 = /dev/dvxirq0 First DVX device
2525 1 = /dev/dvxirq1 Second DVX device
2526 ...
2527
2528180 char USB devices
2529 0 = /dev/usb/lp0 First USB printer
2530 ...
2531 15 = /dev/usb/lp15 16th USB printer
1da177e4
LT		 2532 48 = /dev/usb/scanner0 First USB scanner
2533 ...
2534 63 = /dev/usb/scanner15 16th USB scanner
2535 64 = /dev/usb/rio500 Diamond Rio 500
2536 65 = /dev/usb/usblcd USBLCD Interface (info@usblcd.de)
2537 66 = /dev/usb/cpad0 Synaptics cPad (mouse/LCD)
11420211
JE		 2538 96 = /dev/usb/hiddev0 1st USB HID device
2539 ...
2540 111 = /dev/usb/hiddev15 16th USB HID device
04c860c1
AC		 2541 112 = /dev/usb/auer0 1st auerswald ISDN device
2542 ...
2543 127 = /dev/usb/auer15 16th auerswald ISDN device
11420211
JE		 2544 128 = /dev/usb/brlvgr0 First Braille Voyager device
2545 ...
2546 131 = /dev/usb/brlvgr3 Fourth Braille Voyager device
2547 132 = /dev/usb/idmouse ID Mouse (fingerprint scanner) device
2548 133 = /dev/usb/sisusbvga1 First SiSUSB VGA device
2549 ...
30aaa5c6 2550 140 = /dev/usb/sisusbvga8 Eighth SISUSB VGA device
11420211
JE		 2551 144 = /dev/usb/lcd USB LCD device
2552 160 = /dev/usb/legousbtower0 1st USB Legotower device
2553 ...
2554 175 = /dev/usb/legousbtower15 16th USB Legotower device
5b775f67
GKH		 2555 176 = /dev/usb/usbtmc1 First USB TMC device
2556 ...
1b62d258
GKH		 2557 191 = /dev/usb/usbtmc16 16th USB TMC device
2558 192 = /dev/usb/yurex1 First USB Yurex device
2559 ...
2560 209 = /dev/usb/yurex16 16th USB Yurex device
11420211
JE		 2561 240 = /dev/usb/dabusb0 First daubusb device
2562 ...
2563 243 = /dev/usb/dabusb3 Fourth dabusb device
1da177e4
LT		 2564
2565180 block USB block devices
953a7f20
PZ		 2566 0 = /dev/uba First USB block device
2567 8 = /dev/ubb Second USB block device
2568 16 = /dev/ubc Third USB block device
30aaa5c6 2569 ...
1da177e4
LT		 2570
2571181 char Conrad Electronic parallel port radio clocks
2572 0 = /dev/pcfclock0 First Conrad radio clock
2573 1 = /dev/pcfclock1 Second Conrad radio clock
2574 ...
2575
2576182 char Picture Elements THR2 binarizer
2577 0 = /dev/pethr0 First THR2 board
2578 1 = /dev/pethr1 Second THR2 board
2579 ...
2580
2581183 char SST 5136-DN DeviceNet interface
2582 0 = /dev/ss5136dn0 First DeviceNet interface
2583 1 = /dev/ss5136dn1 Second DeviceNet interface
2584 ...
2585
2586 This device used to be assigned to major number 144.
2587 It had to be moved due to an unfortunate conflict.
2588
2589184 char Picture Elements' video simulator/sender
2590 0 = /dev/pevss0 First sender board
2591 1 = /dev/pevss1 Second sender board
2592 ...
2593
2594185 char InterMezzo high availability file system
2595 0 = /dev/intermezzo0 First cache manager
2596 1 = /dev/intermezzo1 Second cache manager
2597 ...
2598
0ea6e611
JM		 2599 See http://web.archive.org/web/20080115195241/
2600 http://inter-mezzo.org/index.html
1da177e4
LT		 2601
2602186 char Object-based storage control device
2603 0 = /dev/obd0 First obd control device
2604 1 = /dev/obd1 Second obd control device
2605 ...
2606
2607 See ftp://ftp.lustre.org/pub/obd for code and information.
2608
2609187 char DESkey hardware encryption device
2610 0 = /dev/deskey0 First DES key
2611 1 = /dev/deskey1 Second DES key
2612 ...
2613
2614188 char USB serial converters
2615 0 = /dev/ttyUSB0 First USB serial converter
2616 1 = /dev/ttyUSB1 Second USB serial converter
2617 ...
2618
2619189 char USB serial converters - alternate devices
2620 0 = /dev/cuusb0 Callout device for ttyUSB0
2621 1 = /dev/cuusb1 Callout device for ttyUSB1
2622 ...
2623
2624190 char Kansas City tracker/tuner card
2625 0 = /dev/kctt0 First KCT/T card
2626 1 = /dev/kctt1 Second KCT/T card
2627 ...
2628
2629191 char Reserved for PCMCIA
2630
2631192 char Kernel profiling interface
2632 0 = /dev/profile Profiling control device
2633 1 = /dev/profile0 Profiling device for CPU 0
2634 2 = /dev/profile1 Profiling device for CPU 1
2635 ...
2636
2637193 char Kernel event-tracing interface
2638 0 = /dev/trace Tracing control device
2639 1 = /dev/trace0 Tracing device for CPU 0
2640 2 = /dev/trace1 Tracing device for CPU 1
2641 ...
2642
2643194 char linVideoStreams (LINVS)
2644 0 = /dev/mvideo/status0 Video compression status
2645 1 = /dev/mvideo/stream0 Video stream
2646 2 = /dev/mvideo/frame0 Single compressed frame
2647 3 = /dev/mvideo/rawframe0 Raw uncompressed frame
2648 4 = /dev/mvideo/codec0 Direct codec access
2649 5 = /dev/mvideo/video4linux0 Video4Linux compatibility
2650
2651 16 = /dev/mvideo/status1 Second device
2652 ...
2653 32 = /dev/mvideo/status2 Third device
2654 ...
2655 ...
30aaa5c6 2656 240 = /dev/mvideo/status15 16th device
1da177e4
LT		 2657 ...
2658
2659195 char Nvidia graphics devices
2660 0 = /dev/nvidia0 First Nvidia card
2661 1 = /dev/nvidia1 Second Nvidia card
2662 ...
2663 255 = /dev/nvidiactl Nvidia card control device
2664
2665196 char Tormenta T1 card
2666 0 = /dev/tor/0 Master control channel for all cards
2667 1 = /dev/tor/1 First DS0
2668 2 = /dev/tor/2 Second DS0
2669 ...
2670 48 = /dev/tor/48 48th DS0
2671 49 = /dev/tor/49 First pseudo-channel
2672 50 = /dev/tor/50 Second pseudo-channel
2673 ...
2674
2675197 char OpenTNF tracing facility
2676 0 = /dev/tnf/t0 Trace 0 data extraction
2677 1 = /dev/tnf/t1 Trace 1 data extraction
2678 ...
2679 128 = /dev/tnf/status Tracing facility status
2680 130 = /dev/tnf/trace Tracing device
2681
2682198 char Total Impact TPMP2 quad coprocessor PCI card
2683 0 = /dev/tpmp2/0 First card
2684 1 = /dev/tpmp2/1 Second card
2685 ...
2686
2687199 char Veritas volume manager (VxVM) volumes
2688 0 = /dev/vx/rdsk/*/* First volume
2689 1 = /dev/vx/rdsk/*/* Second volume
2690 ...
2691
2692199 block Veritas volume manager (VxVM) volumes
2693 0 = /dev/vx/dsk/*/* First volume
2694 1 = /dev/vx/dsk/*/* Second volume
2695 ...
2696
2697 The namespace in these directories is maintained by
2698 the user space VxVM software.
2699
2700200 char Veritas VxVM configuration interface
2701 0 = /dev/vx/config Configuration access node
2702 1 = /dev/vx/trace Volume i/o trace access node
2703 2 = /dev/vx/iod Volume i/o daemon access node
2704 3 = /dev/vx/info Volume information access node
2705 4 = /dev/vx/task Volume tasks access node
2706 5 = /dev/vx/taskmon Volume tasks monitor daemon
2707
2708201 char Veritas VxVM dynamic multipathing driver
2709 0 = /dev/vx/rdmp/* First multipath device
2710 1 = /dev/vx/rdmp/* Second multipath device
2711 ...
2712201 block Veritas VxVM dynamic multipathing driver
2713 0 = /dev/vx/dmp/* First multipath device
2714 1 = /dev/vx/dmp/* Second multipath device
2715 ...
2716
2717 The namespace in these directories is maintained by
2718 the user space VxVM software.
2719
2720202 char CPU model-specific registers
2721 0 = /dev/cpu/0/msr MSRs on CPU 0
2722 1 = /dev/cpu/1/msr MSRs on CPU 1
2723 ...
2724
11420211
JE		 2725202 block Xen Virtual Block Device
2726 0 = /dev/xvda First Xen VBD whole disk
2727 16 = /dev/xvdb Second Xen VBD whole disk
2728 32 = /dev/xvdc Third Xen VBD whole disk
2729 ...
2730 240 = /dev/xvdp Sixteenth Xen VBD whole disk
2731
2732 Partitions are handled in the same way as for IDE
2733 disks (see major number 3) except that the limit on
2734 partitions is 15.
2735
1da177e4
LT		 2736203 char CPU CPUID information
2737 0 = /dev/cpu/0/cpuid CPUID on CPU 0
2738 1 = /dev/cpu/1/cpuid CPUID on CPU 1
2739 ...
2740
2741204 char Low-density serial ports
2742 0 = /dev/ttyLU0 LinkUp Systems L72xx UART - port 0
2743 1 = /dev/ttyLU1 LinkUp Systems L72xx UART - port 1
2744 2 = /dev/ttyLU2 LinkUp Systems L72xx UART - port 2
2745 3 = /dev/ttyLU3 LinkUp Systems L72xx UART - port 3
2746 4 = /dev/ttyFB0 Intel Footbridge (ARM)
2747 5 = /dev/ttySA0 StrongARM builtin serial port 0
2748 6 = /dev/ttySA1 StrongARM builtin serial port 1
2749 7 = /dev/ttySA2 StrongARM builtin serial port 2
2750 8 = /dev/ttySC0 SCI serial port (SuperH) - port 0
2751 9 = /dev/ttySC1 SCI serial port (SuperH) - port 1
2752 10 = /dev/ttySC2 SCI serial port (SuperH) - port 2
2753 11 = /dev/ttySC3 SCI serial port (SuperH) - port 3
2754 12 = /dev/ttyFW0 Firmware console - port 0
2755 13 = /dev/ttyFW1 Firmware console - port 1
2756 14 = /dev/ttyFW2 Firmware console - port 2
2757 15 = /dev/ttyFW3 Firmware console - port 3
2758 16 = /dev/ttyAM0 ARM "AMBA" serial port 0
2759 ...
2760 31 = /dev/ttyAM15 ARM "AMBA" serial port 15
2761 32 = /dev/ttyDB0 DataBooster serial port 0
2762 ...
2763 39 = /dev/ttyDB7 DataBooster serial port 7
2764 40 = /dev/ttySG0 SGI Altix console port
2765 41 = /dev/ttySMX0 Motorola i.MX - port 0
2766 42 = /dev/ttySMX1 Motorola i.MX - port 1
2767 43 = /dev/ttySMX2 Motorola i.MX - port 2
2768 44 = /dev/ttyMM0 Marvell MPSC - port 0
2769 45 = /dev/ttyMM1 Marvell MPSC - port 1
2770 46 = /dev/ttyCPM0 PPC CPM (SCC or SMC) - port 0
2771 ...
2772 47 = /dev/ttyCPM5 PPC CPM (SCC or SMC) - port 5
11420211
JE		 2773 50 = /dev/ttyIOC0 Altix serial card
2774 ...
2775 81 = /dev/ttyIOC31 Altix serial card
2776 82 = /dev/ttyVR0 NEC VR4100 series SIU
2777 83 = /dev/ttyVR1 NEC VR4100 series DSIU
2778 84 = /dev/ttyIOC84 Altix ioc4 serial card
2779 ...
2780 115 = /dev/ttyIOC115 Altix ioc4 serial card
2781 116 = /dev/ttySIOC0 Altix ioc3 serial card
2782 ...
2783 147 = /dev/ttySIOC31 Altix ioc3 serial card
2784 148 = /dev/ttyPSC0 PPC PSC - port 0
2785 ...
2786 153 = /dev/ttyPSC5 PPC PSC - port 5
2787 154 = /dev/ttyAT0 ATMEL serial port 0
1da177e4 2788 ...
11420211
JE		 2789 169 = /dev/ttyAT15 ATMEL serial port 15
2790 170 = /dev/ttyNX0 Hilscher netX serial port 0
2791 ...
2792 185 = /dev/ttyNX15 Hilscher netX serial port 15
a4521948 2793 186 = /dev/ttyJ0 JTAG1 DCC protocol based serial port emulation
30aaa5c6
TM		 2794 187 = /dev/ttyUL0 Xilinx uartlite - port 0
2795 ...
2796 190 = /dev/ttyUL3 Xilinx uartlite - port 3
2797 191 = /dev/xvc0 Xen virtual console - port 0
04c860c1
AC		 2798 192 = /dev/ttyPZ0 pmac_zilog - port 0
2799 ...
2800 195 = /dev/ttyPZ3 pmac_zilog - port 3
2801 196 = /dev/ttyTX0 TX39/49 serial port 0
2802 ...
2803 204 = /dev/ttyTX7 TX39/49 serial port 7
2804 205 = /dev/ttySC0 SC26xx serial port 0
2805 206 = /dev/ttySC1 SC26xx serial port 1
2806 207 = /dev/ttySC2 SC26xx serial port 2
2807 208 = /dev/ttySC3 SC26xx serial port 3
05b36302
AC		 2808 209 = /dev/ttyMAX0 MAX3100 serial port 0
2809 210 = /dev/ttyMAX1 MAX3100 serial port 1
2810 211 = /dev/ttyMAX2 MAX3100 serial port 2
2811 212 = /dev/ttyMAX3 MAX3100 serial port 3
1da177e4
LT		 2812
2813205 char Low-density serial ports (alternate device)
2814 0 = /dev/culu0 Callout device for ttyLU0
2815 1 = /dev/culu1 Callout device for ttyLU1
2816 2 = /dev/culu2 Callout device for ttyLU2
2817 3 = /dev/culu3 Callout device for ttyLU3
2818 4 = /dev/cufb0 Callout device for ttyFB0
2819 5 = /dev/cusa0 Callout device for ttySA0
2820 6 = /dev/cusa1 Callout device for ttySA1
2821 7 = /dev/cusa2 Callout device for ttySA2
2822 8 = /dev/cusc0 Callout device for ttySC0
2823 9 = /dev/cusc1 Callout device for ttySC1
2824 10 = /dev/cusc2 Callout device for ttySC2
2825 11 = /dev/cusc3 Callout device for ttySC3
2826 12 = /dev/cufw0 Callout device for ttyFW0
2827 13 = /dev/cufw1 Callout device for ttyFW1
2828 14 = /dev/cufw2 Callout device for ttyFW2
2829 15 = /dev/cufw3 Callout device for ttyFW3
2830 16 = /dev/cuam0 Callout device for ttyAM0
2831 ...
2832 31 = /dev/cuam15 Callout device for ttyAM15
2833 32 = /dev/cudb0 Callout device for ttyDB0
2834 ...
2835 39 = /dev/cudb7 Callout device for ttyDB7
2836 40 = /dev/cusg0 Callout device for ttySG0
2837 41 = /dev/ttycusmx0 Callout device for ttySMX0
2838 42 = /dev/ttycusmx1 Callout device for ttySMX1
2839 43 = /dev/ttycusmx2 Callout device for ttySMX2
2840 46 = /dev/cucpm0 Callout device for ttyCPM0
2841 ...
2842 49 = /dev/cucpm5 Callout device for ttyCPM5
2843 50 = /dev/cuioc40 Callout device for ttyIOC40
2844 ...
2845 81 = /dev/cuioc431 Callout device for ttyIOC431
11420211
JE		 2846 82 = /dev/cuvr0 Callout device for ttyVR0
2847 83 = /dev/cuvr1 Callout device for ttyVR1
1da177e4 2848
1da177e4
LT		 2849206 char OnStream SC-x0 tape devices
2850 0 = /dev/osst0 First OnStream SCSI tape, mode 0
2851 1 = /dev/osst1 Second OnStream SCSI tape, mode 0
2852 ...
2853 32 = /dev/osst0l First OnStream SCSI tape, mode 1
2854 33 = /dev/osst1l Second OnStream SCSI tape, mode 1
2855 ...
2856 64 = /dev/osst0m First OnStream SCSI tape, mode 2
2857 65 = /dev/osst1m Second OnStream SCSI tape, mode 2
2858 ...
2859 96 = /dev/osst0a First OnStream SCSI tape, mode 3
2860 97 = /dev/osst1a Second OnStream SCSI tape, mode 3
2861 ...
2862 128 = /dev/nosst0 No rewind version of /dev/osst0
2863 129 = /dev/nosst1 No rewind version of /dev/osst1
2864 ...
2865 160 = /dev/nosst0l No rewind version of /dev/osst0l
2866 161 = /dev/nosst1l No rewind version of /dev/osst1l
2867 ...
2868 192 = /dev/nosst0m No rewind version of /dev/osst0m
2869 193 = /dev/nosst1m No rewind version of /dev/osst1m
2870 ...
2871 224 = /dev/nosst0a No rewind version of /dev/osst0a
2872 225 = /dev/nosst1a No rewind version of /dev/osst1a
2873 ...
2874
2875 The OnStream SC-x0 SCSI tapes do not support the
2876 standard SCSI SASD command set and therefore need
2877 their own driver "osst". Note that the IDE, USB (and
2878 maybe ParPort) versions may be driven via ide-scsi or
2879 usb-storage SCSI emulation and this osst device and
2880 driver as well. The ADR-x0 drives are QIC-157
2881 compliant and don't need osst.
2882
2883207 char Compaq ProLiant health feature indicate
2884 0 = /dev/cpqhealth/cpqw Redirector interface
2885 1 = /dev/cpqhealth/crom EISA CROM
2886 2 = /dev/cpqhealth/cdt Data Table
2887 3 = /dev/cpqhealth/cevt Event Log
2888 4 = /dev/cpqhealth/casr Automatic Server Recovery
2889 5 = /dev/cpqhealth/cecc ECC Memory
2890 6 = /dev/cpqhealth/cmca Machine Check Architecture
2891 7 = /dev/cpqhealth/ccsm Deprecated CDT
2892 8 = /dev/cpqhealth/cnmi NMI Handling
2893 9 = /dev/cpqhealth/css Sideshow Management
2894 10 = /dev/cpqhealth/cram CMOS interface
2895 11 = /dev/cpqhealth/cpci PCI IRQ interface
2896
2897208 char User space serial ports
2898 0 = /dev/ttyU0 First user space serial port
2899 1 = /dev/ttyU1 Second user space serial port
2900 ...
2901
2902209 char User space serial ports (alternate devices)
2903 0 = /dev/cuu0 Callout device for ttyU0
2904 1 = /dev/cuu1 Callout device for ttyU1
2905 ...
2906
2907210 char SBE, Inc. sync/async serial card
2908 0 = /dev/sbei/wxcfg0 Configuration device for board 0
2909 1 = /dev/sbei/dld0 Download device for board 0
2910 2 = /dev/sbei/wan00 WAN device, port 0, board 0
2911 3 = /dev/sbei/wan01 WAN device, port 1, board 0
2912 4 = /dev/sbei/wan02 WAN device, port 2, board 0
2913 5 = /dev/sbei/wan03 WAN device, port 3, board 0
2914 6 = /dev/sbei/wanc00 WAN clone device, port 0, board 0
2915 7 = /dev/sbei/wanc01 WAN clone device, port 1, board 0
2916 8 = /dev/sbei/wanc02 WAN clone device, port 2, board 0
2917 9 = /dev/sbei/wanc03 WAN clone device, port 3, board 0
2918 10 = /dev/sbei/wxcfg1 Configuration device for board 1
2919 11 = /dev/sbei/dld1 Download device for board 1
2920 12 = /dev/sbei/wan10 WAN device, port 0, board 1
2921 13 = /dev/sbei/wan11 WAN device, port 1, board 1
2922 14 = /dev/sbei/wan12 WAN device, port 2, board 1
2923 15 = /dev/sbei/wan13 WAN device, port 3, board 1
2924 16 = /dev/sbei/wanc10 WAN clone device, port 0, board 1
2925 17 = /dev/sbei/wanc11 WAN clone device, port 1, board 1
2926 18 = /dev/sbei/wanc12 WAN clone device, port 2, board 1
2927 19 = /dev/sbei/wanc13 WAN clone device, port 3, board 1
2928 ...
2929
2930 Yes, each board is really spaced 10 (decimal) apart.
2931
2932211 char Addinum CPCI1500 digital I/O card
2933 0 = /dev/addinum/cpci1500/0 First CPCI1500 card
2934 1 = /dev/addinum/cpci1500/1 Second CPCI1500 card
2935 ...
2936
2937212 char LinuxTV.org DVB driver subsystem
1da177e4
LT		 2938 0 = /dev/dvb/adapter0/video0 first video decoder of first card
2939 1 = /dev/dvb/adapter0/audio0 first audio decoder of first card
2940 2 = /dev/dvb/adapter0/sec0 (obsolete/unused)
2941 3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2942 4 = /dev/dvb/adapter0/demux0 first demux device of first card
2943 5 = /dev/dvb/adapter0/dvr0 first digital video recoder device of first card
2944 6 = /dev/dvb/adapter0/ca0 first common access port of first card
2945 7 = /dev/dvb/adapter0/net0 first network device of first card
2946 8 = /dev/dvb/adapter0/osd0 first on-screen-display device of first card
2947 9 = /dev/dvb/adapter0/video1 second video decoder of first card
2948 ...
2949 64 = /dev/dvb/adapter1/video0 first video decoder of second card
2950 ...
2951 128 = /dev/dvb/adapter2/video0 first video decoder of third card
2952 ...
2953 196 = /dev/dvb/adapter3/video0 first video decoder of fourth card
2954
c611d2cd
MH		 2955216 char Bluetooth RFCOMM TTY devices
2956 0 = /dev/rfcomm0 First Bluetooth RFCOMM TTY device
2957 1 = /dev/rfcomm1 Second Bluetooth RFCOMM TTY device
1da177e4
LT		 2958 ...
2959
c611d2cd
MH		 2960217 char Bluetooth RFCOMM TTY devices (alternate devices)
2961 0 = /dev/curf0 Callout device for rfcomm0
2962 1 = /dev/curf1 Callout device for rfcomm1
1da177e4
LT		 2963 ...
2964
2965218 char The Logical Company bus Unibus/Qbus adapters
2966 0 = /dev/logicalco/bci/0 First bus adapter
2967 1 = /dev/logicalco/bci/1 First bus adapter
2968 ...
2969
2970219 char The Logical Company DCI-1300 digital I/O card
2971 0 = /dev/logicalco/dci1300/0 First DCI-1300 card
2972 1 = /dev/logicalco/dci1300/1 Second DCI-1300 card
2973 ...
2974
2975220 char Myricom Myrinet "GM" board
2976 0 = /dev/myricom/gm0 First Myrinet GM board
2977 1 = /dev/myricom/gmp0 First board "root access"
2978 2 = /dev/myricom/gm1 Second Myrinet GM board
2979 3 = /dev/myricom/gmp1 Second board "root access"
2980 ...
2981
2982221 char VME bus
2983 0 = /dev/bus/vme/m0 First master image
2984 1 = /dev/bus/vme/m1 Second master image
2985 2 = /dev/bus/vme/m2 Third master image
2986 3 = /dev/bus/vme/m3 Fourth master image
2987 4 = /dev/bus/vme/s0 First slave image
2988 5 = /dev/bus/vme/s1 Second slave image
2989 6 = /dev/bus/vme/s2 Third slave image
2990 7 = /dev/bus/vme/s3 Fourth slave image
2991 8 = /dev/bus/vme/ctl Control
2992
2993 It is expected that all VME bus drivers will use the
2994 same interface. For interface documentation see
2995 http://www.vmelinux.org/.
2996
2997224 char A2232 serial card
2998 0 = /dev/ttyY0 First A2232 port
2999 1 = /dev/ttyY1 Second A2232 port
3000 ...
3001
3002225 char A2232 serial card (alternate devices)
3003 0 = /dev/cuy0 Callout device for ttyY0
3004 1 = /dev/cuy1 Callout device for ttyY1
3005 ...
3006
3007226 char Direct Rendering Infrastructure (DRI)
3008 0 = /dev/dri/card0 First graphics card
3009 1 = /dev/dri/card1 Second graphics card
3010 ...
3011
3012227 char IBM 3270 terminal Unix tty access
3013 1 = /dev/3270/tty1 First 3270 terminal
3014 2 = /dev/3270/tty2 Seconds 3270 terminal
3015 ...
3016
3017228 char IBM 3270 terminal block-mode access
3018 0 = /dev/3270/tub Controlling interface
3019 1 = /dev/3270/tub1 First 3270 terminal
3020 2 = /dev/3270/tub2 Second 3270 terminal
3021 ...
3022
30aaa5c6
TM		 3023229 char IBM iSeries/pSeries virtual console
3024 0 = /dev/hvc0 First console port
3025 1 = /dev/hvc1 Second console port
1da177e4
LT		 3026 ...
3027
3028230 char IBM iSeries virtual tape
3029 0 = /dev/iseries/vt0 First virtual tape, mode 0
3030 1 = /dev/iseries/vt1 Second virtual tape, mode 0
3031 ...
3032 32 = /dev/iseries/vt0l First virtual tape, mode 1
3033 33 = /dev/iseries/vt1l Second virtual tape, mode 1
3034 ...
3035 64 = /dev/iseries/vt0m First virtual tape, mode 2
3036 65 = /dev/iseries/vt1m Second virtual tape, mode 2
3037 ...
3038 96 = /dev/iseries/vt0a First virtual tape, mode 3
3039 97 = /dev/iseries/vt1a Second virtual tape, mode 3
3040 ...
3041 128 = /dev/iseries/nvt0 First virtual tape, mode 0, no rewind
3042 129 = /dev/iseries/nvt1 Second virtual tape, mode 0, no rewind
3043 ...
3044 160 = /dev/iseries/nvt0l First virtual tape, mode 1, no rewind
3045 161 = /dev/iseries/nvt1l Second virtual tape, mode 1, no rewind
3046 ...
3047 192 = /dev/iseries/nvt0m First virtual tape, mode 2, no rewind
3048 193 = /dev/iseries/nvt1m Second virtual tape, mode 2, no rewind
3049 ...
3050 224 = /dev/iseries/nvt0a First virtual tape, mode 3, no rewind
3051 225 = /dev/iseries/nvt1a Second virtual tape, mode 3, no rewind
3052 ...
3053
3054 "No rewind" refers to the omission of the default
3055 automatic rewind on device close. The MTREW or MTOFFL
3056 ioctl()'s can be used to rewind the tape regardless of
3057 the device used to access it.
3058
11420211 3059231 char InfiniBand
1da177e4
LT		 3060 0 = /dev/infiniband/umad0
3061 1 = /dev/infiniband/umad1
11420211
JE		 3062 ...
3063 63 = /dev/infiniband/umad63 63rd InfiniBandMad device
3064 64 = /dev/infiniband/issm0 First InfiniBand IsSM device
3065 65 = /dev/infiniband/issm1 Second InfiniBand IsSM device
3066 ...
3067 127 = /dev/infiniband/issm63 63rd InfiniBand IsSM device
3068 128 = /dev/infiniband/uverbs0 First InfiniBand verbs device
3069 129 = /dev/infiniband/uverbs1 Second InfiniBand verbs device
3070 ...
3071 159 = /dev/infiniband/uverbs31 31st InfiniBand verbs device
3072
3073232 char Biometric Devices
3074 0 = /dev/biometric/sensor0/fingerprint first fingerprint sensor on first device
3075 1 = /dev/biometric/sensor0/iris first iris sensor on first device
3076 2 = /dev/biometric/sensor0/retina first retina sensor on first device
3077 3 = /dev/biometric/sensor0/voiceprint first voiceprint sensor on first device
3078 4 = /dev/biometric/sensor0/facial first facial sensor on first device
3079 5 = /dev/biometric/sensor0/hand first hand sensor on first device
3080 ...
3081 10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
3082 ...
3083 20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
3084 ...
1da177e4 3085
11420211
JE		 3086233 char PathScale InfiniPath interconnect
3087 0 = /dev/ipath Primary device for programs (any unit)
3088 1 = /dev/ipath0 Access specifically to unit 0
3089 2 = /dev/ipath1 Access specifically to unit 1
3090 ...
3091 4 = /dev/ipath3 Access specifically to unit 3
3092 129 = /dev/ipath_sma Device used by Subnet Management Agent
3093 130 = /dev/ipath_diag Device used by diagnostics programs
3094
3095234-239 UNASSIGNED
1da177e4
LT		 3096
3097240-254 char LOCAL/EXPERIMENTAL USE
30aaa5c6 3098
1da177e4
LT		 3099240-254 block LOCAL/EXPERIMENTAL USE
3100 Allocated for local/experimental use. For devices not
3101 assigned official numbers, these ranges should be
3102 used in order to avoid conflicting with future assignments.
3103
3104255 char RESERVED
30aaa5c6 3105
1da177e4
LT		 3106255 block RESERVED
3107
3108 This major is reserved to assist the expansion to a
3109 larger number space. No device nodes with this major
3110 should ever be created on the filesystem.
992caacf 3111 (This is probably not true anymore, but I'll leave it
11420211
JE		 3112 for now /Torben)
3113
3114---LARGE MAJORS!!!!!---
3115
3116256 char Equinox SST multi-port serial boards
3117 0 = /dev/ttyEQ0 First serial port on first Equinox SST board
3118 127 = /dev/ttyEQ127 Last serial port on first Equinox SST board
3119 128 = /dev/ttyEQ128 First serial port on second Equinox SST board
3120 ...
3121 1027 = /dev/ttyEQ1027 Last serial port on eighth Equinox SST board
3122
3123256 block Resident Flash Disk Flash Translation Layer
3124 0 = /dev/rfda First RFD FTL layer
3125 16 = /dev/rfdb Second RFD FTL layer
3126 ...
3127 240 = /dev/rfdp 16th RFD FTL layer
3128
a4521948
JE		 3129257 char Phoenix Technologies Cryptographic Services Driver
3130 0 = /dev/ptlsec Crypto Services Driver
3131
30aaa5c6
TM		 3132257 block SSFDC Flash Translation Layer filesystem
3133 0 = /dev/ssfdca First SSFDC layer
3134 8 = /dev/ssfdcb Second SSFDC layer
3135 16 = /dev/ssfdcc Third SSFDC layer
3136 24 = /dev/ssfdcd 4th SSFDC layer
3137 32 = /dev/ssfdce 5th SSFDC layer
3138 40 = /dev/ssfdcf 6th SSFDC layer
3139 48 = /dev/ssfdcg 7th SSFDC layer
3140 56 = /dev/ssfdch 8th SSFDC layer
3141
3142258 block ROM/Flash read-only translation layer
3143 0 = /dev/blockrom0 First ROM card's translation layer interface
3144 1 = /dev/blockrom1 Second ROM card's translation layer interface
3145 ...
1da177e4 3146
04c860c1
AC		 3147259 block Block Extended Major
3148 Used dynamically to hold additional partition minor
3149 numbers and allow large numbers of partitions per device
3150
3151259 char FPGA configuration interfaces
3152 0 = /dev/icap0 First Xilinx internal configuration
3153 1 = /dev/icap1 Second Xilinx internal configuration
3154
71969fd9
BH		 3155260 char OSD (Object-based-device) SCSI Device
3156 0 = /dev/osd0 First OSD Device
3157 1 = /dev/osd1 Second OSD Device
3158 ...
3159 255 = /dev/osd255 256th OSD Device
3160
1da177e4
LT		 3161 **** ADDITIONAL /dev DIRECTORY ENTRIES
3162
3163This section details additional entries that should or may exist in
3164the /dev directory. It is preferred that symbolic links use the same
3165form (absolute or relative) as is indicated here. Links are
3166classified as "hard" or "symbolic" depending on the preferred type of
3167link; if possible, the indicated type of link should be used.
3168
3169
3170 Compulsory links
3171
3172These links should exist on all systems:
3173
3174/dev/fd /proc/self/fd symbolic File descriptors
3175/dev/stdin fd/0 symbolic stdin file descriptor
3176/dev/stdout fd/1 symbolic stdout file descriptor
3177/dev/stderr fd/2 symbolic stderr file descriptor
3178/dev/nfsd socksys symbolic Required by iBCS-2
3179/dev/X0R null symbolic Required by iBCS-2
3180
3181Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
3182
3183 Recommended links
3184
3185It is recommended that these links exist on all systems:
3186
3187/dev/core /proc/kcore symbolic Backward compatibility
3188/dev/ramdisk ram0 symbolic Backward compatibility
3189/dev/ftape qft0 symbolic Backward compatibility
3190/dev/bttv0 video0 symbolic Backward compatibility
3191/dev/radio radio0 symbolic Backward compatibility
3192/dev/i2o* /dev/i2o/* symbolic Backward compatibility
3193/dev/scd? sr? hard Alternate SCSI CD-ROM name
3194
3195 Locally defined links
3196
3197The following links may be established locally to conform to the
3198configuration of the system. This is merely a tabulation of existing
3199practice, and does not constitute a recommendation. However, if they
3200exist, they should have the following uses.
3201
3202/dev/mouse mouse port symbolic Current mouse device
3203/dev/tape tape device symbolic Current tape device
3204/dev/cdrom CD-ROM device symbolic Current CD-ROM device
3205/dev/cdwriter CD-writer symbolic Current CD-writer device
3206/dev/scanner scanner symbolic Current scanner device
3207/dev/modem modem port symbolic Current dialout device
3208/dev/root root device symbolic Current root filesystem
3209/dev/swap swap device symbolic Current swap device
3210
3211/dev/modem should not be used for a modem which supports dialin as
3212well as dialout, as it tends to cause lock file problems. If it
3213exists, /dev/modem should point to the appropriate primary TTY device
3214(the use of the alternate callout devices is deprecated).
3215
3216For SCSI devices, /dev/tape and /dev/cdrom should point to the
3217``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3218/dev/cdwriter and /dev/scanner should point to the appropriate generic
3219SCSI devices (/dev/sg*).
3220
3221/dev/mouse may point to a primary serial TTY device, a hardware mouse
3222device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3223
3224 Sockets and pipes
3225
3226Non-transient sockets and named pipes may exist in /dev. Common entries are:
3227
3228/dev/printer socket lpd local socket
3229/dev/log socket syslog local socket
3230/dev/gpmdata socket gpm mouse multiplexer
3231
3232 Mount points
3233
3234The following names are reserved for mounting special filesystems
3235under /dev. These special filesystems provide kernel interfaces that
3236cannot be provided with standard device nodes.
3237
3238/dev/pts devpts PTY slave filesystem
3239/dev/shm tmpfs POSIX shared memory maintenance access
3240
3241 **** TERMINAL DEVICES
3242
3243Terminal, or TTY devices are a special class of character devices. A
3244terminal device is any device that could act as a controlling terminal
3245for a session; this includes virtual consoles, serial ports, and
3246pseudoterminals (PTYs).
3247
3248All terminal devices share a common set of capabilities known as line
fff9289b 3249disciplines; these include the common terminal line discipline as well
1da177e4
LT		 3250as SLIP and PPP modes.
3251
3252All terminal devices are named similarly; this section explains the
3253naming and use of the various types of TTYs. Note that the naming
3254conventions include several historical warts; some of these are
3255Linux-specific, some were inherited from other systems, and some
3256reflect Linux outgrowing a borrowed convention.
3257
3258A hash mark (#) in a device name is used here to indicate a decimal
3259number without leading zeroes.
3260
3261 Virtual consoles and the console device
3262
3263Virtual consoles are full-screen terminal displays on the system video
3264monitor. Virtual consoles are named /dev/tty#, with numbering
3265starting at /dev/tty1; /dev/tty0 is the current virtual console.
3266/dev/tty0 is the device that should be used to access the system video
3267card on those architectures for which the frame buffer devices
3268(/dev/fb*) are not applicable. Do not use /dev/console
3269for this purpose.
3270
3271The console device, /dev/console, is the device to which system
3272messages should be sent, and on which logins should be permitted in
3273single-user mode. Starting with Linux 2.1.71, /dev/console is managed
3274by the kernel; for previous versions it should be a symbolic link to
3275either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3276a serial port primary (tty*, not cu*) device, depending on the
3277configuration of the system.
3278
3279 Serial ports
3280
3281Serial ports are RS-232 serial ports and any device which simulates
3282one, either in hardware (such as internal modems) or in software (such
3283as the ISDN driver.) Under Linux, each serial ports has two device
3284names, the primary or callin device and the alternate or callout one.
3285Each kind of device is indicated by a different letter. For any
3286letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3287respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3288correspond to /dev/cua# and /dev/cub#. In the future, it should be
3289expected that multiple letters will be used; all letters will be upper
3290case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3291"cu" device (e.g. /dev/cudp#).
3292
3293The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3294
3295The alternate devices provide for kernel-based exclusion and somewhat
3296different defaults than the primary devices. Their main purpose is to
3297allow the use of serial ports with programs with no inherent or broken
3298support for serial ports. Their use is deprecated, and they may be
3299removed from a future version of Linux.
3300
3301Arbitration of serial ports is provided by the use of lock files with
3302the names /var/lock/LCK..ttyX#. The contents of the lock file should
3303be the PID of the locking process as an ASCII number.
3304
3305It is common practice to install links such as /dev/modem
3306which point to serial ports. In order to ensure proper locking in the
3307presence of these links, it is recommended that software chase
3308symlinks and lock all possible names; additionally, it is recommended
3309that a lock file be installed with the corresponding alternate
3310device. In order to avoid deadlocks, it is recommended that the locks
3311are acquired in the following order, and released in the reverse:
3312
3313 1. The symbolic link name, if any (/var/lock/LCK..modem)
3314 2. The "tty" name (/var/lock/LCK..ttyS2)
3315 3. The alternate device name (/var/lock/LCK..cua2)
3316
3317In the case of nested symbolic links, the lock files should be
3318installed in the order the symlinks are resolved.
3319
3320Under no circumstances should an application hold a lock while waiting
3321for another to be released. In addition, applications which attempt
3322to create lock files for the corresponding alternate device names
3323should take into account the possibility of being used on a non-serial
3324port TTY, for which no alternate device would exist.
3325
3326 Pseudoterminals (PTYs)
3327
3328Pseudoterminals, or PTYs, are used to create login sessions or provide
fff9289b 3329other capabilities requiring a TTY line discipline (including SLIP or
1da177e4
LT		 3330PPP capability) to arbitrary data-generation processes. Each PTY has
3331a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3332/dev/tty[p-za-e][0-9a-f]. The kernel arbitrates the use of PTYs by
3333allowing each master side to be opened only once.
3334
3335Once the master side has been opened, the corresponding slave device
3336can be used in the same manner as any TTY device. The master and
3337slave devices are connected by the kernel, generating the equivalent
3338of a bidirectional pipe with TTY capabilities.
3339
3340Recent versions of the Linux kernels and GNU libc contain support for
3341the System V/Unix98 naming scheme for PTYs, which assigns a common
3342device, /dev/ptmx, to all the masters (opening it will automatically
3343give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3344for the slaves; the slaves are named with decimal integers (/dev/pts/#
3345in our notation). This removes the problem of exhausting the
3346namespace and enables the kernel to automatically create the device
3347nodes for the slaves on demand using the "devpts" filesystem.
3348
Clone of davem's net-next-2.6 tree