Trying to Zerodisk a CX4-120 - what does SP A: FRU not available for disk zeroing mean?

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?