SCSI support in 2.0.29 has changed from earlier versions but still fails
for me when I try to tar a SCSI disk to a SCSI tape.
I have an Adaptec 1542C controller with a 1.1 Gb disk and an Exabyte
tape plus two IDE disks.
With all kernel versions since 1.??, I have been able to make tar
backups of the IDE disks to the Exabyte tape without any problems but
after 1.2.13, no version of the SCSI code has been able to backup the
SCSI disk to the Exabyte.
Until 2.0.29, I got many error messages reporting SCSI resets and then
a hung system from which I could usually recover by powering down and
then restarting.
With 2.0.29, I get no error message at all; just a hung system and
damaged file systems.
If you look at the changes in 2.0.29, you will see that there have been no
changes to the SCSI subsystem nor to the Adaptec 1542 driver that would explain
this lockup problem. In fact, 2.0.29 contains very few changes of any kind.
If you are seeing timeouts in 2.0.x for x < 29, I suggest you try increasing
the timeout constants in sd.c and st.c to see if that helps.
Leonard