root@imac-proxmox:~#     mkdir -p /mnt/pve/hdd-data/jellyfin-data
root@imac-proxmox:~#     pct config 102 | grep rootfs
rootfs: hdd-data:102/vm-102-disk-0.raw,size=16G
root@imac-proxmox:~#     losetup -fP /mnt/pve/hdd-data/images/102/vm-102-disk-0.raw
root@imac-proxmox:~#     losetup -l | grep vm-102-disk
/dev/loop2         0      0         0  0 /mnt/pve/hdd-data/images/102/vm-102-disk-0.raw   0     512
root@imac-proxmox:~#     mkdir -p /mnt/jellyfin-root-temp
root@imac-proxmox:~#     mount /dev/loop0p2 /mnt/jellyfin-root-temp
mount: /mnt/jellyfin-root-temp: fsconfig() failed: /dev/loop0p2: Can't lookup blockdev.
       dmesg(1) may have more information after failed mount system call.
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:~#