This issue has been resolved.  We only THOUGHT we had deleted all the RAID groups and LUNS....after hunting down the rest and deleting them, zerodisk worked like a champ.
We have a CX4-120 that we are retiring and I need to run zerodisk on the SAN before it leaves the data center.  So I have naviseccli installed on my desktop and I have run the proper command to zerodisk the entire array.   I am getting this as a result...  Bus 0 Enclosure 2  Disk 8 Error: zerodisk command failed Error returned from Agent SP A: FRU not available for disk zeroing  Bus 0 Enclosure 2  Disk 9 Error: zerodisk command failed Error returned from Agent SP A: FRU not available for disk zeroing  Bus 0 Enclosure 2  Disk 10 Error: zerodisk command failed Error returned from Agent SP A: FRU not available for disk zeroing  For everything but the bound drives in the Vault.   Does this mean my CX4 firmware is too old to run zerodisk? 
Trying to Zerodisk a CX4-120 - what does SP A: FRU not available for disk 
zeroing mean?