Subject: Re: NCR PCI SCSI bugs/fixes? Help!
To: Michael L. VanLoon -- Iowa State University <firstname.lastname@example.org>
From: Stefan Esser <se@MI.Uni-Koeln.DE>
Date: 01/21/1995 22:47:45
On Jan 21, 15:29, "Michael L. VanLoon -- Iowa State University" wrote:
} Subject: NCR PCI SCSI bugs/fixes? Help!
} I'm using a Dell OmniPlex 66MHz Pentium machine at my new job with a
} NCR PCI SCSI (53c810) card in it and two SCSI drives. I'm running
} NetBSD-1.0 that was supped off sun-lamp before the tree was turned
} back into current, several weeks ago (sources and binaries from my own
} home machine). The machine was working wonderfully under light load.
} We are running a news server on it, and ran a limited feed to it to
} test things out. Things were working great.
} But, when we opened up the full feed, sending literally thousands of
} articles an hour, things aren't working as well. Twice in the last
} two days the machine has died.
Sorry to hear about your problems.
There have been no fixes recently, and the code
works well for us under light and high load, so
there might be some other problem, not related
to the driver (of course we take this seriously
and will look into this !).
(There have been reports about panics under high
load on two systems using the NCR with FreeBSD-2.0,
but it is not obvious at all that the NCR driver
is at fault. We need more input to start looking
for a possible bug ...)
Could you please send us as much information as
you have available:
1) Error messages (best send the complete log file, gzipped, uudecoded)
2) Hardware description (number of drives, models, internal/extrernal, ...)
I've seen the kind of behaviour on our Sun Sparc
file server before, and it was related to problems
with long cables, which made one particular device
act strange and interfere with the other devices
operation (i.e. we didn't use the tape drive that
caused the problem, but it made our disks loose
The other case where I heard of problems under high
load it turned out to have been an overloaded power
supply, that just couldn't support all drives seeking
It's not easy to distinguish such problems from
driver bugs, since in both cases things just get
Send the detailed data to Wolfgang Stanglmeier and me,
and wwe'll look into it immediately.
Stefan Esser Internet: <se@ZPR.Uni-Koeln.DE>
Zentrum fuer Paralleles Rechnen Tel: +49 221 4706019
Universitaet zu Koeln FAX: +49 221 4705160