Volume 'volume name' from vFiler 'vFiler name' is mounted using AIX NFS version 4. This configuration is not supported for snapshot difference incremental backups.
Snapshot difference incremental backups are not supported for vFiler volumes mounted using AIX® NFS version 4.
Snapshot difference incremental backup fails.
This problem is documented by NetApp BURT 630200. Apply the fix for this once it is available from NetApp. Specify "testflag snapdiffenablevfilernfs4" in dsm.opt file and retry the snapshot difference incremental backup.