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Diffstat (limited to 'Documentation/scsi/ncr53c7xx.txt')
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diff --git a/Documentation/scsi/ncr53c7xx.txt b/Documentation/scsi/ncr53c7xx.txt new file mode 100644 index 00000000000..91e9552d63e --- /dev/null +++ b/Documentation/scsi/ncr53c7xx.txt @@ -0,0 +1,40 @@ +README for WarpEngine/A4000T/A4091 SCSI kernels. + +Use the following options to disable options in the SCSI driver. + +Using amiboot for example..... + +To disable Synchronous Negotiation.... + + amiboot -k kernel 53c7xx=nosync:0 + +To disable Disconnection.... + + amiboot -k kernel 53c7xx=nodisconnect:0 + +To disable certain SCSI devices... + + amiboot -k kernel 53c7xx=validids:0x3F + + this allows only device ID's 0,1,2,3,4 and 5 for linux to handle. + (this is a bitmasked field - i.e. each bit represents a SCSI ID) + +These commands work on a per controller basis and use the option 'next' to +move to the next controller in the system. + +e.g. + amiboot -k kernel 53c7xx=nodisconnect:0,next,nosync:0 + + this uses No Disconnection on the first controller and Asynchronous + SCSI on the second controller. + +Known Issues: + +Two devices are known not to function with the default settings of using +synchronous SCSI. These are the Archive Viper 150 Tape Drive and the +SyQuest SQ555 removeable hard drive. When using these devices on a controller +use the 'nosync:0' option. + +Please try these options and post any problems/successes to me. + +Alan Hourihane <alanh@fairlite.demon.co.uk> |