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Linus Torvalds1da177e2005-04-16 15:20:36 -07001README for WarpEngine/A4000T/A4091 SCSI kernels.
2
3Use the following options to disable options in the SCSI driver.
4
5Using amiboot for example.....
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7To disable Synchronous Negotiation....
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9 amiboot -k kernel 53c7xx=nosync:0
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11To disable Disconnection....
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13 amiboot -k kernel 53c7xx=nodisconnect:0
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15To disable certain SCSI devices...
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17 amiboot -k kernel 53c7xx=validids:0x3F
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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)
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22These commands work on a per controller basis and use the option 'next' to
23move to the next controller in the system.
24
25e.g.
26 amiboot -k kernel 53c7xx=nodisconnect:0,next,nosync:0
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28 this uses No Disconnection on the first controller and Asynchronous
29 SCSI on the second controller.
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31Known Issues:
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33Two devices are known not to function with the default settings of using
34synchronous SCSI. These are the Archive Viper 150 Tape Drive and the
35SyQuest SQ555 removeable hard drive. When using these devices on a controller
36use the 'nosync:0' option.
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38Please try these options and post any problems/successes to me.
39
40Alan Hourihane <alanh@fairlite.demon.co.uk>