That depends on what your error is. It’s not a magic process, it just tries to help you with formatting. The validate is the magic, it helps you spot errors as you make them.

Thanks. My setup is way over complicated with 3 hosts in a cluster and shared storage, so local storage on the hosts stay unused. But i have been thinking about redoing it with separate hosts. This solution looks promising for sharing data, even if just on one host

So lxc containers and not vm’s

Could you explain further with a bit more detail? I havnt looked at this in a while but back then the options where virtiofs or nfs

If you want to share storage you need some way of doing that. Zfs is a good option for storage on vm-host level, but ist not designed for shared usage. Im not sure what you are after, but maybe you want zfs storage inside the vm for snapshots, dedup etc? Or maybe you want to share your media storage between vm’s? The first case you can use zfs inside your vm, it does not know or care about how its disks are stored or of they are a physical drive. For the second use-case you want some way to share drives, like smb, nfs etc. or a distributed filesystem if you really want to over complicate things. Truenas might be over overkill for sharing a few volumes, but you need something. I believe you can share zfs over nfs now but i have never used that outside of proxmox cluster storage

I use both debian on a vm with samba+nfs and a bare metal truenas for my needs. Find your needs and figure out what solves them

So you mount the pool to each vm that needs the shared data? Afaik zfs is not made for concurrency

You have a mighty big hand if you reach l and a with the same one