[Lustre-discuss] group descriptor corruption

[Andreas Dilger]

On 2011-04-01, at 8:01 AM, John White wrote:
> I wonder if these errors are generally fixable via an e2fsck:
> [root at n0004 ~]# e2fsck /dev/mpath/lun_11 
> e2fsck 1.41.10.sun2 (24-Feb-2010)
> mako-OST000b: recovering journal
> One or more block group descriptor checksums are invalid.  Fix<y>? no
> 
> Group descriptor 128 checksum is invalid.  IGNORED.
> [...]
> Group descriptor 59614 checksum is invalid.  IGNORED.

This will happen any time that e2fsck is running from a backup superblock, if uninit_bg is newly enabled (though fixed in upstream git versions), or if the filesystem UUID is changed.

Cheers, Andreas
--
Andreas Dilger 
Principal Engineer
Whamcloud, Inc.