It's propably easier to backup everything and reinstall with ZFS on a single disc. But I would try again with a mirrored setup and trying to find the reason why it didn't before. ZFS has a lot of nice features even with just one disc (like the replication between nodes, compression etc) but it's protection against bitrot needs a mirror or raidz setup to work good.
Just a minor addition: depends on the definition of "good", but copies=2 can work here too, although I never used it.
Hence "works good"
copies=2 is nice for stuff like external USB discs but won't protect against a disc failure.
Well the good thing at the start is that you still can do such a thing without worry to much about production (even if it's just your home) as long as you have backupsYep, I did just that. Right after I posted. I still don't know what happened. Both disks are fairly new Samsung 860 pros and checked out fine, so I just tried again and it worked. I've since reinstalled, literally, 35 times. Each time creating VMs, storage, and such, learning at least in a basic sense how everything works, then reinstalling again, trying to import the VMs and recreate the storage. It's been...interesting
Who doesn't? People (myself included) never care about backup until they need restore (which unfortunely needs backups)
Well the good thing at the start is that you still can do such a thing without worry to much about production (even if it's just your home) as long as you have backups
And for future experiments (be it playing with Ceph/Clustering, upgrading PVE8to9, using a different filesystem etc) you could even install ProxmoxVE inside a VM. Obviouvsly the performance might not be great (lxcs should be ok though) with nested virtualization but for "learn+play" that should be more than fine .
Who doesn't? People (myself included) never care about backup until they need restore (which unfortunely needs backups)
