Can't recover from broken ext3 journal

Can't recover from broken ext3 journal

[brian]

I had a harddrive develop hard IO errors in the section of the drive
that holds the ext3 journal.

If it try to fsck the filesystem, fsck eventually terminates after
trying to replay the journal.

I tried to use debugfs but that fails in similar way.

When I use tune2fs to try to turn off the journal, even with
the -f option, it simply reports 'the needs_recovery flag is
set, please run e2fsck'.

I've replaced the drive and restored from backups, however, it seems
rather poor design that I should lose *all* my data on the drive simply
because the journal won't replay due to an disk error.

The man pages for 'tune2fs' even implies you can use it for
the very purpose of removing a broken journal but it doesn't
work, as I reported above.

I could comment out the check in the tune2fs source code, however, is
there a proper way to do this?

Thanks,

-- 
Brian Litzinger

Re: Can't recover from broken ext3 journal

[Andreas Dilger]

On Mar 26, 2003  01:30 -0800, brian@worldcontrol.com wrote:
> I had a harddrive develop hard IO errors in the section of the drive
> that holds the ext3 journal.
> 
> If it try to fsck the filesystem, fsck eventually terminates after
> trying to replay the journal.
> 
> I tried to use debugfs but that fails in similar way.
> 
> When I use tune2fs to try to turn off the journal, even with
> the -f option, it simply reports 'the needs_recovery flag is
> set, please run e2fsck'.
> 
> I've replaced the drive and restored from backups, however, it seems
> rather poor design that I should lose *all* my data on the drive simply
> because the journal won't replay due to an disk error.

debugfs -w -R "feature ^has_journal ^needs_recovery" /dev/whatever
e2fsck -f /dev/whatever

Cheers, Andreas
--
Andreas Dilger
http://sourceforge.net/projects/ext2resize/
http://www-mddsp.enel.ucalgary.ca/People/adilger/