@dthenot
I have been able to migrate all vms over to qcow2. Think shutting down the vms and booting backup. Alos if anything from this thread might have had an impact. https://xcp-ng.org/forum/topic/12087/backups-with-qcow2-enabled/9
@acebmxer
As you can deduce, I already have a VM that is running XO-CE.
I'm guessing that my first move should be to shutdown that VM and create a new VM to use as the Xen Orchestra controller. That will be my next move. If I run into trouble, I can always turn off the new VM and power on the one I had been using.
Different use cases: Ceph is better with more hosts (at least 6 or 7 minimum) while XOSTOR is better between 3 to 7/8.
We might have better Ceph support in the future for large clusters.