I run a docker host in Proxmox using ZFS datasets for the VM storage for things like my mailserver and NexcloudAIO. When I backup the docker VM, it snapshots the VM at a point in time, and backs up the snapshot to PBS. I’ve restored from that backup and it’s like the machine had just shut down as far as the data is concerned. It journals itself back to a consistent state and no data loss.

I wouldn’t run TrueNAS at all because I have no idea how that’s managing it’s storage and wouldn’t trust the result.

I gave up when I got like 5 wrong. I’ve ran mail servers for decades, most of the invalid “valids” would get rejected by any mailservers I’ve administered.

I do this with a calibre/calibreweb docker stack, and fbreader on my tablet/phone. Unfortunately you need to use g drive for progress sync, but that’s not a huge roadblock.

Finally got a drive to replace a deader in my zpool. Raid10 ftw