

Hmm, what method did you use to back it up? It sounds to me like something got corrupted, though perhaps someone more experienced could identify a different issue. What I usually do to clone LUKS partitions is use a liveUSB (so no files change while backing up), then use cryptsetup
to create a new LUKS partition on the backup drive if it’s a new drive (otherwise for incremental backups you can skip this step), then unlock both drives and rsync
to the backup drive. This is also usually faster than pure cloning, as cloning would also copy the (encrypted) empty space in the partition, and for incremental backups, rsync
will only copy the changed data so it’s much faster.
This would also have the benefit of preventing corruption on transfer, because rsync
uses checksums to verify the file was properly reconstructed in the new location, whereas something like dd
won’t have the granularity to check per-file checksums (especially if used to clone a whole encrypted partition).
Okay, then mufasio’s comment may be more on track.