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Date:      Tue, 17 Feb 1998 07:28:34 -0700 (MST)
From:      Steve Grandi <grandi@noao.edu>
To:        Zach Heilig <zach@gaffaneys.com>
Cc:        freebsd-stable@FreeBSD.ORG
Subject:   Re: I need a strategy for making my STABLE installation stable
Message-ID:  <Pine.LNX.3.96.980217072805.10525B-100000@mirfak.tuc.noao.edu>
In-Reply-To: <19980217071306.47614@gaffaneys.com>

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Zach:

Interesting!  Something else to try....

On Tue, 17 Feb 1998, Zach Heilig wrote:

> On Mon, Feb 16, 1998 at 12:41:10PM -0700, Steve Grandi wrote:
> > The hardware:  PentiumPro-200 (Venus MotherBoard), 128 MB of RAM, Adaptec
> > 2940 Ultra-Wide SCSI controller, two Seagate ST32155W 2GB disks, a
> > Micropolis 3391WS 9GB disk, Plextor SCSI CD-ROM, Intel EtherExpress Pro
>   ^^^^^^^^^^ I have a SCSI chain that works great (at Ultra speeds)
> with just about every device I can plug into it (async, 200ns, 100ns,
> 50ns speeds), except my solitary Micropolis disk.  It negotiates ultra
> speeds, but it causes much grief when there is much activity on the bus.
> 
> The symptoms I noticed started with the kernel refusing to communicate
> with anything in /dev (I usually run X, which continued to work... at
> least long enough to see what was happening), followed by an optional
> spew of many messages something like 'ncr: device timed out...' in
> xconsole.  At this point, opening windows for programs already in the
> cache that also don't use anything from /dev still worked.  As soon as 
> I touched anything that also touched the disk or anything in /dev, the
> machine completely locked up.
> 
> Moving said Micropolis disk to a fast-scsi controller fixed the problem.
> 
> -- 
> Zach Heilig -- zach@gaffaneys.com
> 

Steve Grandi, National Optical Astronomy Observatories, Tucson, Arizona USA
Internet: grandi@noao.edu  Voice: +1 520 318-8228


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