there should be two replication checkpoints per file system on target celerra, you can see them by running server_mount  and then you can look at their size  /nas/sbin/rootnas_fs -size root_rep_ckpt_513_60358_2
I've read "How to check the actual space usage by checkpoint" and that works for a source FS with a checkpoint and replication enabled.  nas_fs -size   However, I'm looking at my replication target FS that does not have any checkpoints and cannot use the same command to find the exact space used in MB (I have DART 5.6).  One workaround that I can think of is to create a checkpoint on the replication target FS and then run nas_fs command. But that's two additional steps (creating and deleting) per FS.  Is there another way to get the same results.  Thanks,
How to check savvol space used by replication