Hello!
root@proxmox:~# uname -a
Linux proxmox 4.2.6-1-pve #1 SMP Wed Dec 9 10:49:55 CET 2015 x86_64 GNU/Linux
mount
root@proxmox:~# mount -o loop /home/disks/diskone.iso /media
mount: unknown filesystem type 'iso9660'
modprobe
root@proxmox:~# modprobe isofs
modprobe: ERROR: could not insert...