root@imac-proxmox:~#     mount /dev/loop2p2 /mnt/jellyfin-root-temp
mount: /mnt/jellyfin-root-temp: fsconfig() failed: /dev/loop2p2: Can't lookup blockdev.
       dmesg(1) may have more information after failed mount system call.
root@imac-proxmox:~#     df -h /mnt/jellyfin-root-temp
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/pve-root   38G   19G   17G  53% /
root@imac-proxmox:~#     ls /mnt/jellyfin-root-temp
root@imac-proxmox:~#     cp -a /mnt/jellyfin-root-temp/var/lib/jellyfin/. /mnt/pve/hdd-data/jellyfin-data/
cp: cannot stat '/mnt/jellyfin-root-temp/var/lib/jellyfin/.': No such file or directory
root@imac-proxmox:~#