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Date:      Mon, 01 Oct 2001 22:51:19 +0100
From:      ian j hart <ianjhart@ntlworld.com>
To:        Keith Mitchell <kmitch@weenix.guru.org>
Cc:        Matt Dillon <dillon@earth.backplane.com>, freebsd-stable@FreeBSD.ORG, kmitch@guru.org
Subject:   Re: fs corruption (ATA / 4.4-REL)
Message-ID:  <3BB8E557.2752CB2F@ntlworld.com>
References:  <20011001195142.87F0025@weenix.guru.org>

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Keith Mitchell wrote:
> 
> >     It's worth updating to the latest -stable kernel.  At least one other
> >     person has reported filesystem corruption due to kstack underflows which
> >     went away when I bumped UPAGES from 2 to 3.  I don't think the stack
> >     fixes for the IDE drivers have been MFCd to -stable yet so heavy IDE use
> >     could be hitting up against the kstack problem.
> 
> After reading more, it doesn't look like my MB is likely the problem.  I have
> been doing massive builds in ports when the problem hits.  The install seems
> to go ok without corruption.  I'm in the process of building a RELENG_4
> image to try (I'm going to build a whole CD just to make sure). It's
> probably going to be a day or two before my new CD is ready for me to try.

With a UDMA33 drive I only got errors under heavy load (like massive
builds).
But if you don't see any error messages I guess UDMA is not the problem.
Did
you check + measure the cables like I suggested?

A re-read of your original post reveals it's a k6 450. Touch the CPU
heatsink. If you burn your finger that's the problem :)

Seriously tho' there were problems with one of the k6 chips, but it's
so long ago I can't remember clearly whether it's the 450. What's the
core voltage printed on the chip, and what's the M/B core voltage set
to.
There should also be a revision number. While you do that I'll see if I
can find the info. If I'm correct there were two versions with different
core voltages - one of which was suspect. Anyone remember this?

What brand is the mobo, maybe someone else has one.

> 
> Is there any way from an installed 4.4.0 system to tell if I'm running
> into this kstack problem definatively?
> 
> --
> Keith Mitchell
> Email: kmitch@guru.org                          PGP key available upon request
> 
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-- 
ian j hart

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