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Date: Mon, 03 Oct 2005 10:48:40 -0700
From: Joe S <js.lists@gmail.com>
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To: Mike Jeays <Mike.Jeays@rogers.com>
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Cc: freebsd-questions@freebsd.org
Subject: Re: Disk errors
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Mike Jeays wrote:
> I am getting one or two of these a day on a Western Digital 80GB disk

Most drive manufacturers provide diagnostic tools for the drives they 
produce. In this case, Western Digital provides a bootable diagnostic tool:

* Data Lifeguard Diagnostic for DOS (CD)
   http://support.wdc.com/download/index.asp?swid=30

Burn the ISO to a CD and boot up the system with the CD.
Run the diagnostics.

It's best to use the tool provided by the manufacturer of the drive you 
have. UltimateBootCD includes most popular drive tools.