Red Hat GLOBAL FILE SYSTEM 5.0, Administrator'S Manual

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Copy% Devices
groupfs vg mwi-a- 752.00M groupfs_mlog
68.62 groupfs_mimage_0(0),groupfs_mimage_1(0)
[groupfs_mimage_0] vg iwi-ao 752.00M
/dev/sdb1(0)
[groupfs_mimage_1] vg iwi-ao 752.00M
/dev/sda1(0)
[groupfs_mlog] vg lwi-ao 4.00M
/dev/sdc1(0)
4. Recovering Physical Volume Metadata
If the volume group metadata area of a physical volume is accidentally overwritten or otherwise
destroyed, you will get an error message indicating that the metadata area is incorrect, or that
the system was unable to find a physical volume with a particular UUID. You may be able to
recover the data the physical volume by writing a new metadata area on the physical volume
specifying the same UUID as the lost metadata.
Caution
You should not attempt this procedure with a working LVM logical volume. You
will lose your data if you specify the incorrect UUID.
The following example shows the sort of output you may see if the metadata area is missing or
corrupted.
[root@link-07 backup]# lvs -a -o +devices
Couldn't find device with uuid 'FmGRh3-zhok-iVI8-7qTD-S5BI-MAEN-NYM5Sk'.
Couldn't find all physical volumes for volume group VG.
Couldn't find device with uuid 'FmGRh3-zhok-iVI8-7qTD-S5BI-MAEN-NYM5Sk'.
Couldn't find all physical volumes for volume group VG.
...
You may be able to find the UUID for the physical volume that was overwritten by looking in the
/etc/lvm/archive
directory. Look in the file
VolumeGroupName_xxxx.vg
for the last known
valid archived LVM metadata for that volume group.
Alternately, you may find that deactivating the volume and setting the
partial
(
-P
) argument
will enable you to find the UUID of the missing corrupted physical volume.
[root@link-07 backup]# vgchange -an --partial
Partial mode. Incomplete volume groups will be activated read-only.
Couldn't find device with uuid 'FmGRh3-zhok-iVI8-7qTD-S5BI-MAEN-NYM5Sk'.
Couldn't find device with uuid 'FmGRh3-zhok-iVI8-7qTD-S5BI-MAEN-NYM5Sk'.
...
Chapter 6. LVM Troubleshooting
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