To my understanding this is a "take all or take none" scenario. You either encrypt something or you encrypt everything as the encryption is done a the physical disk.
Quickspec states:
Quote:
An encrypted HPE 3PAR StoreServ array, i.e. any HPE 3PAR StoreServ array that has the HPE 3PAR Data Encryption license activated or intended to be activated, must have only self-encrypted drives installed.
Encryption license is not part of all-inclusive, most likely due to the fact that HPE is selling that to countries where US companies are not allowed to export cryptography.