So to clarify
In order to enable cross volume inline or background deduplication on a volume, one must run the command
*> volume efficiency modify -vserver VSERVER -volume VOLNAME -cross-volume-inline-dedupe true -
cross-volume-background-dedupe true
However, on a volume that is encrypted with NVE - this command results in error -
Error: command failed: Failed to modify efficiency configuration for volume "VOLNAME" of Vserver "VSERVER": Cross volume deduplication cannot be enabled on encrypted volumes. If there are active SIS
operations then use the "volume efficiency stop -all true -vserver * -volume *" command to stop all efficiency operations on all volumes in the cluster.
In order to enable these storage efficiency commands on NVE volumes, you must rekey each volume?