Hello, I am trying to find a way to use backing files to make snapshots of running VMs. The idea is I pause the VM, use qemu-img to create a new disk file with the currently used file as a backing file, swap the images then unpause the VM. Commands would be something like: ---------- (qemu) stop (qemu) drive_del virtio0 $ qemu-img create -f qcow2 -b os-disk-0.qcow2 os-disk-1.qcow2 (qemu) drive_add 0 file=os-disk-1.qcow2 # I'm not 100% sure on the drive_add syntax (qemu) c ---------- If I try and do this just now I get the error "Can't hot-add drive to type 7" when running the drive_add command. Is there another way to achieve this? Is this something that could potentially be added or would architecture not support what I'm trying to do? Cheers, Iain Watson -- "Just think how stupid the average person is, and then realize that half of them are even stupider!" --George Carlin -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
