Use dd to transfer floppy.img file to floppy.raw dd if=floppy.img of=floppy.raw bs=512 e.g.: dd if=WindowsME.img of=WindowsME.raw bs=512 Transfer iso and raw to proxmox iso store Import raw to VM as disk ssh onto proxmox host qm disk import ./floppy.raw e.g.: qm disk import 422 ./WindowsME.raw dpool Attach drive to VM in Proxmox GUI and set to first in boot order Make note of the ideX and Disk Number of the attached drive Edit VM config to change disk to floppy edit file: /etc/pve/qemu-server/.conf Change line: ideX: :vm--disk-,size=2M To floppy0: :vm--disk-,size=2M e.g.: /etc/pve/qemu-server/422.conf ide1: dpool:vm-422-disk-0,size=2M floppy0: dpool:vm-422-disk-0,size=2M Boot into floppy