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Old 07-12-2010, 02:27 PM   #1
Basher110
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Humax PVR Ext3 Hard Disk Crash


Hi,
First time round on this forum and any advice, even if I'm being stupid would be very welcome. I have a Humax PVR with a 320GB hard disk that uses Ext3 and .mkv files to record TV. It has crashed. I have taken it out and replaced with ease but I want to try (my daughter says I must) get the TV programmes back. I have tried R-Linux but all I get is 4 mkv format files (.ts, HMT and NTS) and loads of VP6, BIK and tac files. There should be almost 100 mkv files.
Can anyone suggest where I can go to get the data back? I am convinced it is still there!
The disk is partioned and three partions (Radio, Photos and Music) seem fine, just the TV one is corrupted.
Many thanks in advance
 
Old 07-12-2010, 04:06 PM   #2
salasi
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Quote:
Originally Posted by Basher110 View Post
The disk is partioned and three partions (Radio, Photos and Music) seem fine, just the TV one is corrupted.
I'm not absolutely clear what you are saying that you have now got; is it a disk with three partitions (and presumably a partition that has disappeared) or is it a disk with four partitions, one of which contains no (usable) data?

Quote:
Originally Posted by Basher110 View Post
. I have taken it out and replaced with ease
The disk is now out of the Humax box and into some Linux computer, and there is no danger of the disk, in particular the TV partition, being written to?

You are saying that you have put in a replacement hard disk, done or not done something that you do not mention about formatting it and now it 'just works', including TV.

I'm a bit out of my comfort zone here, but I think that has to be a chance. If a partition has disappeared totally, if you can put the partition table back as it was (and it ought to be possible to work out what it should be) and you haven't caused any writes in the interim, that should work.

If the partition table is intact, then fsck ought to do a filesystem check. I think fsck runs the appropriate one out of fsck.ext2 and fsck.ext3, but maybe you had better check that.

Beyond that, something like photorec has a good reputation and can be employed on an intact partition on which just the files have become corrupt.
 
Old 07-12-2010, 10:15 PM   #3
schneidz
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maybe photorec will help.
 
Old 07-15-2010, 12:25 PM   #4
Basher110
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Partial success

Thank you both.
Photorec has proved to be successful in a way - I now know the data is still there. It has managed to bering back some video files in formats I don't recognise but vlc player does (GPG and SWC) but they have come back as bits and bobs of the originals all joined together. I tried the "brutal" setting (I know it is designed for jpgs) but that doesn't seem to help. I'm wondering if I manage to put the partion table back as you suggested that may help, but I have to be honest and say I don't know how to go about that.
Can you advise?
 
Old 07-15-2010, 04:18 PM   #5
salasi
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Quote:
Originally Posted by Basher110 View Post
...I'm wondering if I manage to put the partion table back as you suggested that may help, but I have to be honest and say I don't know how to go about that.
If you have already had a go with photorec, that may limit your chances of success, or at least, reduce the numbers of files that can be saved.

In the old days (multibooting and the associated horrors of that), I always used to scribble down the figures in the partition table, when i originally set up the machine, but I guess you didn't do that...

It is, however, a reasonable bet that the partitions are contiguous; that is partition n+1 starts at 1 higher than partition n finishes and the last partition finishes on the highest number available on the disk. This should give you something to try.
 
Old 07-23-2010, 05:25 AM   #6
Basher110
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Smile

Thanks again for the advice I think I am going to have to admit defeat but have learn't alot during the process! I will probably hang on to the drive just incase in the future there is an "VideoRec" written
 
  


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