There have been some fixes to this driver and a crude
INQUIRY evpd page 0x83 has been added. A new diff
against lk 2.5.26 is attached.
There are tarballs on http://www.torque.net/sg/sdebug.html
for lk 2.5.26 and the lk 2.4 series (scsi_debug 
version 0.61).

Doug Gilbert


Douglas Gilbert wrote:
> 
> I have reworked the scsi_debug driver mainly to add
> kernel timers to simulate delayed responses. This is
> more realistic that returning immediately and allows
> commands to become queued. The length of the delay is
> controlled by a new boot line/module option: "scsi_debug_delay".
> 
> Other changes:
>   - support REPORT LUNS
>   - support more MODE SENSE pages
>   - [following Doug Ledford's suggestion] do autsense
>     (i.e. set Scsi_Cmnd::sense_buffer array appropriately
>      when a status of CHECK CONDITION is set)
>   - minor driverfs support
>   - start adding error injection logic, see
>     "scsi_debug_every_nth"
> 
> At the moment the only driverfs support is creating the
> directory: /driverfs/bus/scsi/drivers/scsi_debug
> Patrick Mochel sent a patch to lkml that would have allowed
> driver parameters to be placed in that directory. That patch
> didn't make it into lk 2.5.26 .
> 
> I'm interested in "clean" ways to inject errors. This would
> allow, for example, people to observe (and fix) what happens
> when QUEUE_FULL is returned for the first queued command.
> 
> The attachment is a patch against lk 2.5.26 . The full driver
> and some documentation can be found at
> http://www.torque.net/sg/sdebug.html
> 
> I hope to backport this version to lk 2.4 (where it will become
> scsi_debug version 0.61) shortly.