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# Tested on RHEL 5, 6 & 7
# 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. Couldn't find device with uuid 7GCY3s-1LYB-fhAF-kvu0-cCDm-9Q6m-s6xAQd. Couldn't find device with uuid 48rLN6-ztLy-nzqS-GM2a-9yvB-Cua5-wU826d. # 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. # UUID for the physical volume that was overwritten can be found in the /etc/lvm/archive # directory. Look in the file testvg_<00044-439430220>.vg for the last known valid # archived LVM metadata for that volume group. # If possible, before beginning, take a backup of F.S. existing on the Volume Group VG=testvg # umount F.S. FS="" for LV in `lvs --noheadings /dev/$VG | awk '{print$1}'`; do FS="$FS `mount | grep "$VG-$LV" | awk '{print$3}'`"; done for FS in $FS; do umount $FS; done # Deactivate the Volume Group vgchange -an --partial $VG Partial mode. Incomplete volume groups will be activated read-only. 0 logical volume(s) in volume group "testvg" now active # Restore the right UUID (the lost ones) on the adequate Physical Volumes (match between disk # and UUID can be found in valid /etc/lvm/archive/testvg_<00044-439430220>.vg file) pvcreate -ff --uuid "7GCY3s-1LYB-fhAF-kvu0-cCDm-9Q6m-s6xAQd" --restorefile /etc/lvm/archive/testvg_00044-439430220.vg /dev/mpath/mpath9p1 Really INITIALIZE physical volume "/dev/mpath/mpath9p1" of volume group "testvg" [y/n]? y WARNING: Forcing physical volume creation on /dev/mpath/mpath9p1 of volume group "testvg" Physical volume "/dev/mpath/mpath9p1" successfully created pvcreate -ff --uuid "48rLN6-ztLy-nzqS-GM2a-9yvB-Cua5-wU826d" --restorefile /etc/lvm/archive/testvg_00044-439430220.vg /dev/mpath/mpath12p1 Really INITIALIZE physical volume "/dev/mpath/mpath12p1" of volume group "testvg" [y/n]? y WARNING: Forcing physical volume creation on /dev/mpath/mpath12p1 of volume group "testvg" Physical volume "/dev/mpath/mpath12p1" successfully created # Restore Volume Group's metadata vgcfgrestore $VG Restored volume group testvg # Activate Logical Volumes for LV in `lvs --noheadings /dev/$VG | awk '{print$1}'` do lvchange -ay /dev/$VG/$LV done # Verify that Logical Volumes are available vgdisplay -v $VG | egrep "LV Name|LV Status" # Check that you don't have the errors regarding the devices not found Couldn't find device with uuid 7GCY3s-1LYB-fhAF-kvu0-cCDm-9Q6m-s6xAQd. Couldn't find device with uuid 48rLN6-ztLy-nzqS-GM2a-9yvB-Cua5-wU826d. # Mount F.S. # If declared in /etc/fstab: for FS in $FS; do mount $FS; done |