What to do when you have a corrupted LVM filesystem (centos)?
– Boot the server with a Centos cd.
– Press [F5-Rescue]:; > [linux rescue] – Don’t startup the network interfaces
– Skip mounting the filesystem (don’t even mount it read-only !)
lvm vgchange --ignorelockingfailure -P -a y
The output will be something like this:
Disk /dev/sda: 2147 MB, 2147483648 bytes 255 heads, 63 sectors/track, 261 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/sda1 * 1 13 104391 83 Linux /dev/sda2 14 261 1992060 8e Linux LVM
You see now your partitions. The smallest is normally your boot partition /boot, the large one was /.
– mkdir /mnt/boot
– mount /dev/sda1 /mnt/boot
[you have to mount the device that you just have found with fdisk -l]
– Look up the device node for the / filesystem
It should be something like /dev/VolGroup00/LogVol00 (if you have used the default installation of CentOS).
Check the filesystem:
fsck -f -y /dev/VolGroup00/LogVol00
Wait … wait … wait … Be Patient !!
Reboot and keep your fingers crossed 🙂