Description of problem:

After a good discussion with the engineering team we have concluded the best course of action to properly support OCP 4.12, 4.13 with CephFS and datamover will be to document required changes on the ceph storage class.

At this time, but not guaranteed the documentation should not be required for OCP 4.14+

See:

https://issues.redhat.com/browse/RHSTOR-4287

https://github.com/ceph/ceph-csi/blob/devel/docs/cephfs-snapshot-backed-volumes.md

OADP utilizes the CephFS ROX shallow copy feature to efficiently snapshot volumes via VolSync.  If OADP and datamover are used for backing up CephFS backed volumes OpenShift administrators must set a flag on the CephFS storage class.

The parameters of the cephfs storage class must include.

 backingSnapshot: “true”

To