9 thoughts on - DVR Recorder How To Resucue Files

• Ralf Prengel wrote:

  Too little information. Tell us what you tried (the exact command) and what happened (any error message).

• Ralf Prengel wrote:

  Too little information. Tell us what you tried (the exact command) and what happened (any error message).

  Ok, sorry. Our recoder device that stores all videos of several cameras doesn t work any longer. Before doing anything on the the device or the disk I made a full backup oft he disk with dd. Trying to mount this file simple with mount -o loop save.dd /mnt/backup fails. I found out that VDR are using non-standard disk-configurations and filesystems. So my question if there is a way to get access the files in the image. Tools like parted don t show partions in the bckup-file.

  Thanks Ralf

  Ralf Prengel Teamleiter Customer Care Comline AG
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• ralf.prengel@comline.de wrote:

  If this were a normal DVD, you’d have to specify the file system:

  mount -t iso9660 -o loop save.dd /mnt/backup

  But you say the DVD uses a non-standard file system, so this may not work.

  DVDs don’t have partitions, and I don’t think parted would work on an image anyway.

• the OP said “DVR, not “DVD”.

  I’d try fdisk to see if there are partitions, first, then if you find anything that looks likely, try mounting that.

  Also, try the “disks” utility, which also may be able to tell you something about the disk.

  Good luck!

  Fred

• What does the command “file” say to the file you’ve dd’ed?

  Mogens

• It looks like you’ve backuped an entire disk that might contain partitions. So first check if you have partitions inside:

  sudo fdisk -lu save.dd

  If you have partitions inside, use the start offset of the partition to create a loopback device (e.g. a partition starts at 56):

  sudo losetup -o $((56*512)) /dev/loop0 save.dd

  Now you should be able to use the partition. First check and than mount it:

  sudo fsck -fv /dev/loop0
  sudo mount /dev/loop0 /mnt

  Kind regards Thomas

  Am Mi., 26. Aug. 2020 um 15:49 Uhr schrieb :

• It looks like you’ve backuped an entire disk that might contain partitions. So first check if you have partitions inside:

  sudo fdisk -lu save.dd

  If you have partitions inside, use the start offset of the partition to create a loopback device (e.g. a partition starts at 56):

  sudo losetup -o $((56*512)) /dev/loop0 save.dd

  Now you should be able to use the partition. First check and than mount it:

  sudo fsck -fv /dev/loop0
  sudo mount /dev/loop0 /mnt

  xxx

  Hallo, no partions are shown with dd. Found an article that some DVR vendors are using their own filesystems. I think that I ve no chane in this case to rescue anything. Thanks for all hints. Ralf

  Ralf Prengel Teamleiter Customer Care Comline AG
  Hauert 8
  D-44227 Dortmund/Germany

  Telefon:+49 231 97575 157
  Mobil:+49 151 10831 157
  Fax:+49 231 97575 257
  E-Mail:ralf.prengel@comline.de

  http://www.comline.de Vorstand: Stephan Schilling Aufsichtsratsvorsitzender: N.N. HR Dortmund B 14570 USt.-ID-Nr. DE124727422

• Am Do., 27. Aug. 2020 um 13:07 Uhr schrieb :

  dd does not show partitions, fdisk does (or parted or …).

  Regards Thomas

• dd does not show partitions, fdisk does (or parted or …).

  Sorry, my mistake. I used several disktools.

  Ralf Ralf Prengel Teamleiter Customer Care Comline AG
  Hauert 8
  D-44227 Dortmund/Germany

  Telefon:+49 231 97575 157
  Mobil:+49 151 10831 157
  Fax:+49 231 97575 257
  E-Mail:ralf.prengel@comline.de

  http://www.comline.de Vorstand: Stephan Schilling Aufsichtsratsvorsitzender: N.N. HR Dortmund B 14570 USt.-ID-Nr. DE124727422