Windows 7qcow2 File

qemu-img convert -f vmdk -O qcow2 source_image.vmdk output_image.qcow2

virsh blockcommit win7 vda --active --verbose --pivot windows 7qcow2

This allows you to create "linked clones," where multiple VMs share a single base Windows 7 image, saving massive amounts of disk space. How to Create a Windows 7 QCOW2 Image qemu-img convert -f vmdk -O qcow2 source_image