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Date: Fri, 13 Jan 2006 00:59:46 +0100
From: Nicolas Rachinsky <fbsd-hackers-0@ml.turing-complete.org>
To: Peter Jeremy <PeterJeremy@optushome.com.au>
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Cc: Christoph Kukulies <kuku@www.kukulies.org>, freebsd-hackers@freebsd.org
Subject: Re: increasing dd disk to disk transfer rate
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* Peter Jeremy <PeterJeremy@optushome.com.au> [2006-01-13 08:13 +1100]:
> Note that whilst increasing the DD blocksize will speed up the
> transfer, it will also increase the amount of collateral damage when a
> hard error occurs.  If you rummage around the ports or tools tree,
> you'll find a utility (its name escapes me but I believe it was
> written by phk) that is designed to do disk-to-disk recovery - it
> copys data in big slabs until it gets an error and then works around
> the faulty area block by block.

sysutils/dd_rescue

I haven't tried it, but pkg-descr sounds promising.

Nicolas

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http://www.rachinsky.de/nicolas