If a device houses multiple datastore, none of them will be mounted
automatically. If a device only contains a single datastore it will be
mounted automatically. The reason for not mounting multiple datastore
automatically is that we don't know which is actually wanted, and since
mounting all means also all have to be unmounted manually, it made sense
to have the user choose which to mount.
Signed-off-by: Hannes Laimer <h.laimer@proxmox.com>