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Date: Fri, 10 Feb 2006 13:19:52 +0100
From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: Michael Reifenberger <mike@Reifenberger.com>
Message-ID: <20060210121952.GB4925@bsd.trippelsdorf.de>
References: <20060210111959.Y5942@fw.reifenberger.com>
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Cc: FreeBSD Stable <freebsd-stable@freebsd.org>, sos@freebsd.org
Subject: Re: IDE DMA Timeouts
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On Fri, Feb 10, 2006 at 11:35:30AM +0100, Michael Reifenberger wrote:
> since one year I have an amd64 Asus A8V Deluxe with 2 sata WD Raptors and
> AMD64 X2 4800 cpu running fresh i386 RELENG_6/SMP.
> 
> Yesterday I created an gmirror of both disks and now I start getting
> (occasionally) the following messages under load:
> ...
> ad0: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=58914495
> ad0: TIMEOUT - WRITE_DMA retrying (1 retry left) LBA=123039679
> ad1: WARNING - WRITE_DMA UDMA ICRC error (retrying request) LBA=54591167

It looks like bad cabling to me. Try new cables and also run 
smartctl -a /dev/ad0 (and ad1) to check if the hardware is OK.

-- 
Markus