[ovirt-users] Importing KVMs and QCOW

Hey Everyone So one thing that hasnt been clear for me is method for importing KVMs and QCOW images to ovirt. I have had some success with importing some VMs in KVM format by building a VM of same size and then replacing the image file based on its disk ID. My issue so far has been with some premade qcow and sometimes KVMs dont successfully work with the above method. Is it not possible to simply upload to the disk page in the GUI and attach it to the VM, what am I doing wrong here? Thanks in advance