Am 30.03.2010 14:22, schrieb Alexander Graf: > Howdy, > > I just wanted to create a backed qcow2 image and was irritated by qemu-img > not showing me the correct command line option. It's just missing from the > list: [...] > Is this intentional? The actual command still works: > >> ag...@s390t27:~/git/qemu> qemu-img-kvm create -f qcow2 -b >> /media/studio/images/SUSE/s390/sles11.raw /dev/shm/sles11-zipl.qcow2 >> Formatting '/dev/shm/sles11-zipl.qcow2', fmt=qcow2 size=21474836480 >> backing_file='/media/studio/images/SUSE/s390/sles11.raw' encryption=off >> cluster_size=0
-b still works to maintain compatibility with older versions. The documented way is -o backing_file=foo (the qemu-img output you quote even contains this option). Kevin
