qemu-img operations can take very long and there is currently no way to
see their progress.
It would be nice to include this patch to display the progress of a
qemu-img operation (uploaded in November):
https://gerrit.ovirt.org/#/c/33910/
Canceling the qemu-img task from Engine is also something that should be
addressed at some point.
'copyImage' tasks are displayed via vdsClient.
Is there any particular reason why a "Cancel" button was never added to
the Engine's Task list?