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Date: Sun, 1 Mar 2009 19:23:40 +0100 (CET)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Marco <ilikefbsd@web.de>
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Cc: freebsd-questions@freebsd.org
Subject: Re: badblocks on sata drive
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>
> during dd tests i encounter hardware problems with my harddisk. is there
> a way to mark parts of the hdd as "bad" so those are not used anymore?
not much.

you may label it the way it will skip that part.

anyway - sata/IDE drives has in-hardware bad block remapping. if you see 
bad blocks there is already out of space for remapping.

OR - just something was recorded badly some time ago.

clear whole drive with zeros and then retest. there is high change problem 
will go out.

if not - don't use that drive for anything valuable at all