To make full use of a ProxMox backup functionality, you’ll need to convert (of install) your Windows VMs with a .qcow2 format.
If you already installed your windows VM with a .raw extension you can convert the disk image using the following command.
- A Debian 6 install
- A ProxMox 1.9 install
- A Windows VM installed as .raw
How to set this up
Stop the VM in question.
Convert the .raw to .qcow2 using a command like this:
qemu-img convert -p -O qcow2 /var/lib/vz/images/200/vm-200-disk-1.raw /var/lib/vz/images/200/vm-200-disk-1.qcow2