why

I wanted my new proxmox to have mirrored boot drives for redundancy resons. I used somewhat large drives, meaning to pass them trough to a TrueNAS instance

how

Basically just install debian on a mirrored root zfs and then put proxmox on top

• put 2 drives into the system
• follow the Root on ZFS Guide by OpenZFS and set the drives up as a mirror.
• follow the Install Proxmox VE on Debian Bookworm Guide by Proxmox. As new Debian versions are released, new guides will probably be published but the basics likely remain the same

It just so happens I recently migrated a linux system from ext4 to btrfs and didn’t want to do a fresh install. So make a new partition, format it and copy the system over… Too bad I forgot to tell ‘cp’ to preserve the file permissions. I ended up with a system where every last file was owned by root and that obviously causes problem with everything that isn’t executed as root. And of course, the old partition was already gone - bad luck. Reinstalling is pretty much the only ‘solution’ I could find for this problem on the web. What follows are a few simple steps to resurrect a system to at least a runnable / good-enough state: