HP MSA2 4-TB 6G 7.2K 3.5 DP MDL SAS  HPN: 718302-001

Description:
HP 4TB 3.5-inch Serial Attached SCSI (SAS) LFF 6G Dual Port Midline (MDL) Hot-Plug 7.2K MSA2 Hard Drive in HPE MSA2 drive tray with interposer connector  In HPE Hot-Plug MSA Hard Drive Tray For the HPE MSA 1040/2040 SAN Storage Array.
 

They have the required Genuine HPE serial number and MSA firmware

Part #(s):
  ::  Option Part #: C8R26A
  ::  Spare Part #:718302-001
  ::  Model #: MB4000FCWDK
  ::  Model #: ST4000NM0023
  ::  Model #: HUS724040ALS640
  ::  Assembly Part #: 695507-004
  ::  Assembly Part #: 719770-004
  ::  Assembly Part #: 719771-001

Note:
For use only in HPE StorageWorks Systems
Modular Smart Array MSA2 1040/2040/P2000 Systems only.

Overview:
HP MSA2 / MSA2000 controller enclosures and large form factor expansion enclosures accept unique HPE SAS disk drive modules with different firmware and different trays than other HPE storage arrays and Proliant servers. The disk drives have SAS interposers attached to the back which convert the native dual port SAS interface to an SCA-40 connector.

While this SCA-40 connector has the same shape as a Fibre Channel (FC) connector, the drives are NOT utilizing the FC protocol. If you look closely at the interposer, the circuitry is rather simplistic and no bridge / translator chip is attached.

The interposer is, more or less, acting as a signal filter and port relocator to connect to the MSA2's proprietary backplane.