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Date: Thu, 4 Nov 2004 10:23:39 -0500 (EST)
From: Jan Christian Meyer <jcm@metawire.org>
To: Are Bryne <are.bryne@communique.no>
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cc: FreeBSD Questions <questions@freebsd.org>
Subject: Re: ad0: WRITE command timeout...
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On Thu, 4 Nov 2004, Nelis Lamprecht wrote:

> On Thu, 4 Nov 2004 14:10:42 +0100 (CET), Are Bryne wrote:
>
>> After upgrading a computer from FreeBSD 4.8-something to 
>> 4.10-RELEASE-p3, I'm getting lots of the following:
>> 
>> ad0: WRITE command timeout tag=0 serv=0 - resetting
>> ata0: resetting devices .. done
> 
> Seen this once before and in my case it was a faulty hard drive 
> cable. [...] It may also be caused by an incorrect DMA setting if 
> memory serves me correct.

I've seen these come as symptoms of a worn-out drive.
Evidently that's not the only possible cause, but if I were you, 
I'd back up my stuff as soon as possible.

Cheers,
 -Jan Christian