Is it safe to cp a qcow2 vdisk for non-running Qemu-KVM instance to back it up?
As stated - if I stop a Qemu-KVM guest instance (e. g. shutdown -h now inside it and wait for the VM to close "naturally") and I then copy the qcow2 format disk image it runs on out of the host, is that a safe way to backup the VM??
E. g. my idea is to stop the VM, copy the .qcow2 virtual disk image elsewhere, then restart the VM.
If a disaster on physical hardware, simply reinstate / replace hardware and host OS, copy the qcow2 VM virtual disk image back, and start it up again using qemu-system-x86_64 vdisk.img?
Will this work? Also given that the qcow2 file is at the moment only 20GB in size but is set to "actually" be a 1.0TB file... can "sparse" qcow2 format Qemu-KVM VM files be safely backed up this way - by simply copying it while the relevant VM is in a shut down state with the idea to copy that file back in after a disaster and simply start it up again?