Doug Ledford wrote explaining why my 160 MByte drives are being accessed
at 80 MBytes:
> For the latest drivers, when we detect a Quantum 160MByte/s drive we
> automatically reduce the speed down to 80 in order to get around an issue that
> causes SCSI bus lockups and resets. It should be fixed in the future, but in
> the meantime the 80 is intentional and is a work around for a worse problem.
My reply:
Yuck. Ok, thanks for the note.
Meanwhile, I solved my problems with boot time bus timeouts, machine lockups
and rebooting under 2.2.16 (also observed under 2.2.15) by reverting back to
driver version 5.1.21. (I understand that this may leave me vulnerable to
lockups, but since I'm not really using the Quantums yet, and since I can't
boot at all with 5.1.28 or 5.1.30, this is the lesser of the two evils.)
The problems started when I installed a network card, even though the driver
for the card was never installed. The network card was involved somehow
because it was the only real difference between two identical machines.
I remembered someone else complaining about the same sort of behavior, and
wondered if backing out the driver changes would work.
I have all the patches between 5.1.21 and 5.1.28. If someone thinks they know
which patch caused the problem, I can re-create that version and try an
experiment. I'll probably try this anyway, but thought I'd ask in case someone
can help narrow the problem down.
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