When adding a new HPE 3PAR StoreServ 8000 system to a storage pool that uses data-at-rest encryption and an external key manager, it is mandatory that all drives in the new system are self-encrypting drives (SEDs).
This ensures consistent encryption across all systems within the storage pool and compliance with the security policies managed by the external key manager. The SEDs in the new array will use encryption keys provided by the external key manager, maintaining data security across the environment.
References:
* HPE 3PAR StoreServ Encryption
* HPE External Key Manager