I have finally got urbackup working on my unraid server, saving file and image backups to my zfs pool storage. It works great. I have come across some interesting findings relative to the general contextual and generally accepted vocabulary around full image backups.
When ZFS storage is enabled, what is the semantic difference between a UrBackup “full image backup” and an “incremental image backup”? Specifically, does a full image constitute a physically independent complete image, or is it a logically complete restore point that may share unchanged blocks with its predecessor through ZFS/CoW mechanisms?
Inspection of my datasets would lead me to conclude differently than what i would have expected ‘full image backup’ means.