09-01-2009
fsck.gfs2 outputs "RG recovery impossible; I can't fix this file system"
I have a CentOS release 5.2 (Final)host running kernel 2.6.18-92.el5 with at raid 10 that had two mirrored drives fail. The drives were re-inserted and now the raid shows healthy (for now). I tried to mount but got an Input/output error. I then attempted a fsck:
fsck.gfs2 -y /dev/vg_01/uss_vol
This returned the following output (in part):
Block #3518628215 (0xd1ba0177) (21 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3518628216 (0xd1ba0178) (22 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3518628217 (0xd1ba0179) (23 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3518628218 (0xd1ba017a) (24 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3518628219 (0xd1ba017b) (25 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3518628220 (0xd1ba017c) (26 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3518628221 (0xd1ba017d) (27 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3518628222 (0xd1ba017e) (28 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3518628223 (0xd1ba017f) (29 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
Block #3519021440 (0xd1c00180) (33 of 33) is neither GFS2_METATYPE_RB nor GFS2_METATYPE_RG.
Attempting to repair the RG.
(level 2 failed)
Level 3 RG check.
RG 2 is damaged: getting dist from index: 0x26a2e
* RG 1 at block 0x11 *** DAMAGED *** [length 0x26a2e]
RG 2 at block 0x26A3F intact [length 0x12a]
* RG 3 at block 0x26B69 *** DAMAGED *** [length 0x12a]
* RG 4 at block 0x26C93 *** DAMAGED *** [length 0x12a]
* RG 5 at block 0x26DBD *** DAMAGED *** [length 0x12a]
Error: too many bad RGs.
Error rebuilding rg list.
(level 3 failed)
RG recovery impossible; I can't fix this file system.
Now when I try to mount the file system I recieve the following output
[root@host/]# mount /123
/sbin/mount.gfs2: error mounting /dev/mapper/vg_01-123_vol on /123: No such file or directory
/123 exists
The etc/fstab line is:
/dev/vg_01/123_vol /123 gfs2 noatime 1 2
That line is the dame on all other hosts and is verified to be correct.
Any ideas how to get this FS mounted?
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pvck(1M) pvck(1M)
NAME
pvck - check or repair a physical volume in LVM volume group
SYNOPSIS
pv_path
pv_path
DESCRIPTION
This command is supported for arguments belonging to volume groups version 1.0. Attempting this command with arguments belonging to volume
groups version 2.0 or higher will result in an error.
Note: Currently is only capable of detecting bad checksums caused by a forward system migration after a backward system migration. It
should not be used in other situations.
The command examines and repairs LVM data structures on a raw disk (pv_path) in a volume group.
Options and Arguments
recognizes the following options and arguments.
Repair problems found.
Report, but do not repair problems.
pv_path The raw device path name of a physical volume.
RETURN VALUE
returns the following values
Either no problems were found or all problems were corrected.
Unable to repair.
EXAMPLES
Examine LVM checksums on without modifying anything:
Repair LVM checksums on if necessary:
WARNINGS
should only be run on a device whose volume group has not been activated.
is designed to repair the root device or devices while the system is booted in maintenance mode ("", see hpux(1M) on PA-RISC systems).
AUTHOR
was developed by HP.
SEE ALSO
intro(7), lvm(7).
pvck(1M)