Re: NCR resetting SCSI bus in pre-2.0.31-2 and 2.1.47
Urs Thuermann (urs@isnogud.escape.de)
Fri, 8 Aug 1997 00:32:51 +0200
> I have a AHA-2940 SCSI adapter in one of my home machines,
> as well as in one of my work machines. Both have big
> problems with tapes drives (SCSI DAT drives). Making backups
> is highly unreliable, there's only a 50% chance of succesful
> backups. The other times I get exact the same messages you
> described in your e-mail (scsi timeout, aborting, reseting, ...).
>
> I only see these resets when making backups, so I always
> assumed it had something to do with the SCSI tape support
> in linux, but since I never tried copying large data volumes
> from HD to HD, it might indeed be a problem with large
> data volumes (maybe something with DMA transfers?).
I see resets also when not using the tape. In fact I have done a
backup once or twice with the pre-2.0.31-2 without any problems. But
I have always the st.o module loaded. I will try if unloading will
make a difference. The problem is that also with st.o loaded, the bug
will possibly occur only after a long uptime if at all.
> I use kernel 2.0.30...
Hm. Looking at the list of changed files, there were mostly changes
to hardware specific files, but not the aha2940. There are some
general changes, too, but it seems no SCSI tape drive related.
Momentarily, I'm back to 2.0.30, too. I had switched to pre-2.0.31-2
because of the hisax driver and to 2.1.47 because of IPv6.
urs