Gents, I resolved the issue by migrating all archive luns on the CX340 from R5 archive to R6 archive. My NS80g now reflects no R5 archive, and all R5 archive capacity now shows up as R6 archive capacity. After a rescan my Nas_db is up to date.  I can now delete the empty R5 archive storage pool.  BTW I did expand a FS without issues!
I have a situation, I have an NS80g connected to a CX340.  I have the need to rebuild a raid grp from a R5 archive to a R6. The luns in the R5 archive are assigned to the celerra, I need to migrate the luns to a R6 raid grp and rebuild the R5 archive to a R6 . If I do so the Celerra clarata_archive storage pool will shrink in size and the clarata_r6 will grow. I'm sure there is some disk clean up work that will need to be performed to refect the changes.  id      inuse   acl     name 3       n       0       clar_r5_performance 4       y       0       clar_r5_economy 10      y       0       clarata_archive 18      y       0       clarata_r6  What if any commands need to be run to clean up any disk entries?
Removing luns from R5 Storage pool adding to R6 Storage pool