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From: Soren Schmidt <sos@spider.deepcore.dk>
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To: Peter Wemm <peter@wemm.org>
Date: Fri, 19 Dec 2003 10:05:16 +0100 (CET)
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cc: Ion-Mihai Tetcu <itetcu@apropo.ro>
cc: freebsd-current@FreeBSD.ORG
Subject: Re: 5.2RC1 Read+Write data corruption (with SeagateBarracuda ATAV120G
 (ST3120023A) + VIA 8237)
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> Also, it was significantly worse *before* ataNG went in, and its much 
> worse on RELENG_4 than 5.x for us.

Acutally it went away for me on ATAng until I got the AMD64 box.

> Something else just occurred to me..  I think all the problems we've 
> been seeing are on *fast* machines.  (p4/xeon/amd64).  I wonder if
> that is something significant?  I'll see if I can confirm this.

I think you are pretty much on the money, I've been researching this 
problem for quite some time (as you know :) ), and I'm pretty confident
that it is timing related. However I have not been able to find out
exactly where the problem is, and I've tried just about any possible way
to changes timing to get a grip on this. However with that nice amd64
box on my shelf it is alot easier to hunt, as that fails reliably :)

-Søren
                     Yes I know it works under windows!!