Am 30.03.2010 14:32, schrieb Alexander Graf: > > On 30.03.2010, at 14:30, Kevin Wolf wrote: > >> 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). > > Interesting O_o. Maybe it'd be a good idea to give some examples in the help > output? The same way the -e and -b options were having examples there too. > That really makes them easier to find.
Feel free to submit a patch. ;-) Examples sound like an easy way to make these features more visible again. Even better, but a bit more work, would be to include a dynamically generated list of all supported options like this: backing_file: File name of a base image (qcow, qcow2, vmdk) backing_fmt: Image format of the base image (qcow2) encryption: Encrypt the image (qcow, qcow2) Kevin
