Date: Mon, 11 Feb 2002 19:19:34 -0500 From: Matt Penna <mdp1261@ritvax.isc.rit.edu> To: freebsd-questions@freebsd.org Cc: David Winkler <dwinkler@ala.net> Subject: Re: random reboot problem Message-ID: <5.1.0.14.2.20020211191118.029b8970@vmspop.isc.rit.edu> In-Reply-To: <ALEMLPMDJPEKFLNGKIHFKEJGCGAB.dwinkler@ala.net>
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At 05:00 PM 2/11/02 -0600, David Winkler wrote:
>Any information on a fix for this problem, or where to check beyond
>replacing
>hardware ( have replaced drives in the 4.3 machine with no effect ) would
>be greatly appreciated.
David,
You said "beyond replacing hardware," but you did not mention these points
specifically, so I figured I would throw them out, anyway.
I've had several similar problems on systems with unreliable SCSI buses.
This was caused by a number of things, sometimes due to bad drives - a
possibility which you're pretty much eliminated - but more often something
less obvious like a bad cable, improper termination, or low-quality hardware.
There was one system where I had (7) 80-pin SCA drives connected to a 68
pin cable with more than one brand of converter, and it turns out one of
the brands was very low quality; it introduced so much latency as to break
the SCSI bus and resulted in some similar errors as you quoted, though in
my case I couldn't get FreeBSD to install, let alone boot.
I have never seen those kinds of timeout errors in any case where the
hardware was working perfectly, so my advice is to suspend disbelief and
triple-check everything.
Good luck to you! Maybe someone else can offer an alternative suggestion.
Matt
--
Matt Penna mdp1261@rit.edu
ICQ: 399825 S0ba on AOLIM
"The trouble with computers, of course, is
that they're very sophisticated idiots." -Dr. Who
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