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From: Soeren Schmidt <sos@spider.deepcore.dk>
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To: Paul Richards <paul@freebsd-services.com>
Date: Tue, 15 Apr 2003 09:52:24 +0200 (CEST)
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cc: freebsd-current@FreeBSD.ORG
cc: Beech Rintoul <akbeech@northwindcom.net>
Subject: Re: Disk write command timeout
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It seems Paul Richards wrote:
> > I have a Compaq Deskpro PI/200 with a Maxtor 10G drive running
> > yesterday's -CURRENT.
> > Several weeks ago I installed the Maxtor HD and have been having the
> > following problem under heavy disk usage:
> > 
> > Apr 12 09:27:56 stargate kernel: ad2: WRITE command timeout tag=0 serv=0 -
> > reset
> > ting
> 
> I get these periodically too with the following disk.
> 
> ad0: 117800MB <IC35L120AVV207-0> [239340/16/63] at ata2-master UDMA100
> 
> Also, my disk performance seems to generally suck. Soren, have you got a
> benchmark I can run to see if things are OK?

A simple test with dd and a fairly big bs, ie like 1m, should test speed
pretty well. What chipset are you using ?

-Søren