# vboxmanage storageattach $VM --storagectl SATA --port 1 --device 0 --type dvddrive --medium /root/xubuntu-14.04.4-desktop-amd64.iso
# vboxmanage storageattach master-pool-agent-1 --storagectl SATA --port 1 --device 0 --medium emptydrive
# VBoxManage clonehd "source.vmdk" "cloned.vdi" --format vdi
# VBoxManage modifyhd "cloned.vdi" --resize 60200
https://www.serverwatch.com/server-tutorials/using-a-physical-hard-drive-with-a-virtualbox-vm.html