path: root/Documentation/scsi/ncr53c7xx.txt
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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/scsi/ncr53c7xx.txt
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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+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.
+ 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>