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Date: Sun, 7 Jun 2009 13:38:39 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: "John ." <comp.john@googlemail.com>
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Cc: Glen Barber <glen.j.barber@gmail.com>, freebsd-questions@freebsd.org
Subject: Re: please recommend a disk-exercising program?
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>
> That will show me thruput. I need to see if bad blocks or similar are
> happening.

you will - dd will fail with error that case