From owner-freebsd-hackers@FreeBSD.ORG  Thu Jan 12 18:19:38 2006
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To: Eric Anderson <anderson@centtech.com>
In-reply-to: Your message of "Thu, 12 Jan 2006 12:14:30 CST."
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Date: Thu, 12 Jan 2006 10:19:34 -0800
From: Bakul Shah <bakul@BitBlocks.com>
Cc: freebsd-hackers@freebsd.org, Ivan Voras <ivoras@fer.hr>
Subject: Re: increasing dd disk to disk transfer rate 
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> I think after the dd is done, fsck should be run against the affected 
> filesystems, which should take care of most of the issues.

For metadata yes, but not for normal file data.  He wouldn't even know
what got trashed.

> The OP's question was how to make dd faster, not really how to get the 
> data across safely. :)

Sometime you have to answer the question they should've asked!
That is what a diagnostician has to do.  Fix the cause.  Not
the symptom.