From owner-freebsd-scsi@FreeBSD.ORG  Mon Apr  4 15:43:09 2005
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Date: Mon, 04 Apr 2005 10:01:15 -0400
From: Gary Mu1der <gmulder@infotechfl.com>
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Subject: Re: Tyan k8sr lockups
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Roger,

I'm using a PCI 64 bit Adaptec 2200S SCSI card. However the system was 
not under any disk load at the time. It was explained to me that reading 
from memory mapped I/O with the dd command might be crashing the system.

Gary

Roger Marquis wrote:
> Gary Mu1der <gmulder@infotechfl.com> wrote:
> 
>> Any idea how we can get more diagnostics on what in FreeBSD is causing
>> the crash?
> 
> 
> This wasn't a U320 SCSI system by any chance?  The reason I ask is
> that it is very similar to problem a few months ago, on a Tyan
> S2881, which turned out to be pci-x bus related.  Have also seen
> similar/identical issues with other Tyan boards when used with U320
> SCSI controllers.
> 
> -- 
> Roger Marquis
> Roble Systems Consulting
> http://www.roble.com/