Re: Overburned DVD data recovery

2005-10-11 Thread Andrew P.
On 10/11/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Hi,
>
> 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.
>
> 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.
>
> Restoring a 2-week-old backup is an option, but any ideas on how I might
> read data off of these overburned disks would be greatly appreciated.
>
> Thanks,
>
> Matt
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>

I'd start with trying to dd the DVD to an ordinary file
(dd if=/dev/dvd-device of=/usr/recov.iso bs=2048)
and then trying to mount that file.
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Re: Overburned DVD data recovery

2005-10-11 Thread Fabian Keil
[EMAIL PROTECTED] 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
-- 
http://www.fabiankeil.de/


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Overburned DVD data recovery

2005-10-10 Thread mrideout
Hi,

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.

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.

Restoring a 2-week-old backup is an option, but any ideas on how I might
read data off of these overburned disks would be greatly appreciated.

Thanks,

Matt
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