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Date: Fri, 19 Aug 2011 21:47:37 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: Chuck Swiger <cswiger@mac.com>
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	(wonkity.com [127.0.0.1]); Fri, 19 Aug 2011 21:47:37 -0600 (MDT)
Cc: freebsd-stable@freebsd.org, Dan Langille <dan@langille.org>
Subject: Re: bad sector in gmirror HDD
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On Fri, 19 Aug 2011, Chuck Swiger wrote:

> Reading the underlying failing drive with dd will help identify any 
> other questionable sectors.  However, your drive temps are too high-- 
> many vendors call out either 50C or 55C as the point where drive 
> reliability becomes significantly degraded.

The high temperature could be due to impending drive failure.  I've seen 
that exact situation with a failing WD notebook drive.  Lots of read 
failures, and it got very hot.  The same model replacement drive ran 
normally, just warm.