From 4.0 this process got changed and after the disk migration finishes,

Hi all, Before 4.0, when we performed a Live Storage Migration on a vm disk we expected from the disk format to become a qcow because of the auto generated snapshot as part of the live storage migration process. the auto generated snapshot is removed (Live Merge), so the expectation also changed and the format should be the original format of the disk -- Thanks, Raz Tamir Red Hat Israel