[Lustre-discuss] Group descriptors corrupted

[John White]

A little help here?  One OST fails to mount with the following:

LDISKFS-fs: group descriptors corrupted!
LustreError: 8364:0:(obd_mount.c:1278:server_kernel_mount()) premount /dev/mpath/lun_13:0x0 ldiskfs failed: -22, ldiskfs2 failed: -19.  Is the ldiskfs module available?
LustreError: 8364:0:(obd_mount.c:1592:server_fill_super()) Unable to mount device /dev/mpath/lun_13: -22
LustreError: 8364:0:(obd_mount.c:1997:lustre_fill_super()) Unable to mount  (-22)
LDISKFS-fs error (device dm-13): ldiskfs_check_descriptors: Checksum for group 2560 failed (12546!=45229)

I assume running an e2fsck -fy against the OST is the prefered solution, I just want to confirm.  'e2fsck -fn [dev]' gives:
Group descriptor 2560 checksum is invalid.  Fix? no
[...]
Group descriptor 2687 checksum is invalid.  Fix? no


----------------
John White
High Performance Computing Services (HPCS)
(510) 486-7307
One Cyclotron Rd, MS: 50B-3209C
Lawrence Berkeley National Lab
Berkeley, CA 94720