Recover original superblock on corrupted filesystem?

Digvijoy Chatterjee digvijoy_chatterjee at
Fri Oct 21 16:05:19 UTC 2005

You could try using using mkfs -S , to just recreate the SuperBlock,
check man mkfs before u do that.......

take a data backup too

then after superblock is recreated ...mount file system readonly..and
then run fsck...once fsck has fixed the bugs....u can remount
read/write..and ur fs is up and running


On Fri, 2005-10-21 at 15:51 +0100, bloch at wrote:
> I've been trying to use fsck to recover a corrupted filesystem.
> It appears the original superblock is corrupted too, as it has an inode
> count of 0.  When I start fsck with -b 32760, it uses the alternate
> superblock and proceeds.  However, it restarts from the beginning a
> couple of times and after the second restart it doesn't use the
> alternate superblock, stopping instead as it can't find the original
> one.
> Is there a way around this, such as using one of the alternate
> superblocks to replace the broken one, or a way of forcing fsck to keep
> on using the alternate one?  The checking process is taking several
> hours in each case, as it's quite a large filesystem.
> Thanks for any suggestions.
> Adam
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> Ext3-users at

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