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Commit | Line | Data |
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1da177e4 LT |
1 | README for WarpEngine/A4000T/A4091 SCSI kernels. |
2 | ||
3 | Use the following options to disable options in the SCSI driver. | |
4 | ||
5 | Using amiboot for example..... | |
6 | ||
7 | To disable Synchronous Negotiation.... | |
8 | ||
9 | amiboot -k kernel 53c7xx=nosync:0 | |
10 | ||
11 | To disable Disconnection.... | |
12 | ||
13 | amiboot -k kernel 53c7xx=nodisconnect:0 | |
14 | ||
15 | To disable certain SCSI devices... | |
16 | ||
17 | amiboot -k kernel 53c7xx=validids:0x3F | |
18 | ||
19 | this allows only device ID's 0,1,2,3,4 and 5 for linux to handle. | |
20 | (this is a bitmasked field - i.e. each bit represents a SCSI ID) | |
21 | ||
22 | These commands work on a per controller basis and use the option 'next' to | |
23 | move to the next controller in the system. | |
24 | ||
25 | e.g. | |
26 | amiboot -k kernel 53c7xx=nodisconnect:0,next,nosync:0 | |
27 | ||
28 | this uses No Disconnection on the first controller and Asynchronous | |
29 | SCSI on the second controller. | |
30 | ||
31 | Known Issues: | |
32 | ||
33 | Two devices are known not to function with the default settings of using | |
34 | synchronous SCSI. These are the Archive Viper 150 Tape Drive and the | |
35 | SyQuest SQ555 removeable hard drive. When using these devices on a controller | |
36 | use the 'nosync:0' option. | |
37 | ||
38 | Please try these options and post any problems/successes to me. | |
39 | ||
40 | Alan Hourihane <alanh@fairlite.demon.co.uk> |