Create a qcow2 Image
qemu-img create -f qcow2 /path/to/new/image_name.qcow2 500G
Create a RAW Image
qemu-img create -f raw /var/lib/libvirt/images/disk1.img 10G
qemu-img create -f qcow2 /path/to/new/image_name.qcow2 500G
qemu-img create -f raw /var/lib/libvirt/images/disk1.img 10G