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Date: Tue, 11 Oct 2005 11:29:59 +0200
From: Fabian Keil <freebsd-listen@fabiankeil.de>
To: mrideout@windserve.com
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Cc: freebsd-questions@freebsd.org
Subject: Re: Overburned DVD data recovery
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mrideout@windserve.com wrote:

> I have a cron job that backs up a FreeBSD server's files to DVD+RW
> media each evening using growisofs from the dvd+rw-tools port. There
> are some files that I need to recover, but the problem is, the last 2
> weeks of backups were a few hundred megabytes too large, and
> overburned.

AFAIK you can't overburn DVDs.

> Is there any way to recover data from these overburned DVDs? I tried
> mounting them from FreeBSD, Windows and Mac systems without success. I
> also tried running "cat /dev/acd0 | gzip > data.iso.gz" in an attempt
> to grab the raw bits of the disk, but that only resulted in an
> input/output error.

You could try readcd and isoinfo (/usr/ports/sysutils/cdrtools-devel)
but those "few hundred megabytes" at the end will still be lost.

Fabian
--=20
http://www.fabiankeil.de/

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