If you are encountering error messages that are similar to the following: Volume group "pve" not found Cannot process volume group pve Unable to find LVM volume pve/root Gave up waiting for root device. ... ALERT!, /dev/mapper/pve-root does not exist. Dropping to a shell! ... Inactive volume groups? Thin provisioning errors? These all may stem from the fact that you re-named a volume. This video shows you how to rename it and gain access to the server again.