SnapCenter Plug-In for VMware vSphere (SCV)
When backup retention is being applied, SnapCenter fails to delete a snapshot with the following error, found in the
[ERR] Failed to remove the snapshot <snapshot_name>on volume <volume_name>., Exception:This Snapshot copy is currently used as a reference Snapshot copy by one or more SnapMirror relationships. Deleting the Snapshot copy can cause future SnapMirror operations to fail.
Note: the backup information for primary has been deleted, and the snapshot will need to be manually deleted until version 4.4, which added logic to flag the snapshot and attempt the snapshot deletion when the nightly "Storage savings computation" job runs.