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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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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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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