I have a very large LVM disk containing end-of-year backups. This disk is often extended and the filesystem was resized accordingly. During the last extension something must have gone wrong. The newly extended LVM can be activated correctly, but it cannot be mounted as the filesystem size now seems to differ from the physical size of the LVM. Nothing has been written to the device since.
This is not really a ClearOS problem but I wondered if someone may have a clue whether this could be repareable.