@acebmxer Hello,
The error VDI_CBT_ENABLED means that the XAPI doesn't want to move the VDI to not break the CBT chain.
You can disable the CBT on the VDI before migrating the VDI but if you have snapshots with CBT enabled it can be complicated and it might necessitate to remove them before moving the VDI.
We have changes planned to improve the CBT handling in this kind of case.
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.