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Old 01-20-2009, 02:43 AM   #1
eco
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What journaling filesystem has good recovery tools?


Hi all,

I have always used ext3 for my filesystem but I know that trying to recover from it is virtually useless.

There where tools for ext2 to help recover files, but I never got any results in ext3 (dumpe2fs, debugfs, lsdel,...).

Is there a journaling filesystem that has a set of tools that will allow you to recover a deleted file or reconstruct a corrupt filesystem?

Any advice is welcome. Thanks!
 
Old 01-20-2009, 03:26 AM   #2
syg00
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That would be called "backups". Real easy to do recovery with/from.
Restoring deleted files is not the function of a journal - it's there for integrity. And even then, it relies on the hardware. See the first sentence.
 
Old 01-20-2009, 04:06 AM   #3
eco
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OK. I do backup. I was just hoping for a set of tools that might allow me to recover a corrupt fs or at least some system files that might not be backed up. It was possible with ext2 (which was not journaled, I know). I was just wondering if there was another fs that offered the ability to recover files even though it's not it's purpose.
 
Old 01-20-2009, 04:11 AM   #4
georgekraj
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Hi,
Try this software "ext3grep". Hope this might be useful

http://rpmfind.net/linux/rpm2html/se...query=ext3grep
 
Old 01-20-2009, 06:57 AM   #5
Artie
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Check out the filesystem they use in OpenSolaris at http://www.opensolaris.com/ and http://www.opensolaris.org

Artie
 
Old 01-20-2009, 09:00 AM   #6
rweaver
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Quote:
Originally Posted by eco View Post
Hi all,

I have always used ext3 for my filesystem but I know that trying to recover from it is virtually useless.

There where tools for ext2 to help recover files, but I never got any results in ext3 (dumpe2fs, debugfs, lsdel,...).

Is there a journaling filesystem that has a set of tools that will allow you to recover a deleted file or reconstruct a corrupt filesystem?

Any advice is welcome. Thanks!
ext3 isn't hard to recover files from, there have been instances of people recovering 200-300gb drives on ext3 almost completely... it does however take a lot more expertise. It also depends on the type of file you want to recover, generally images and word documents are fairly easy especially if the drive isn't very fragmented, things like random binary files are much more difficult. One tool which I consider nearly essential for ext3 file recovery is ext3grep. Often times it will automatically recover the files without any real intervention on your part.

ext3's journaling doesn't make it impossible to recover files (contrary to what even one of the developers say), just a bit harder in some cases. A lot of times all the information you need to recover the file is stored in the journal or an alternate location, you just need to look for it and not go "oh the inode block points have been cleared that means its gone forever."

If you're going to use a tool like ext3grep, make sure you get the newest version, the home page is at http://code.google.com/p/ext3grep/. Unfortunately, he's not really developing it anymore, because he's not getting much code contributed and it does what he needed it to do.

Last edited by rweaver; 01-20-2009 at 09:08 AM.
 
  


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