On Wed, Oct 16, 2013 at 10:25:30AM +0100, Richard Jones wrote: > qemu-img create -f qcow2 -b backing -o preallocation=metadata,compat=1.1 snapshot Backing file and preallocation cannot be used at the same time This is RHEL6, is behavior different now in Fedora? Other options do not work apparently. But it looks like I could pre-allocate metadata on the backing image. Would that help at all? These numbers sound exiting! -- Later, Lukas "lzap" Zapletal irc: lzap #theforeman -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct