HP MSA2 1TB 7.2K 3.5 inch SATA Hot Swap Hard Drive (AJ740A 480942-001)

Description:
HP MSA/MSA2 1TB 3.5-inch LFF SATA 3Gb/s 7.2K 
Dual Port (DP) MidLine (MDL) Hot-Plug Hard Drive
In HP Hot-Plug MSA/MSA2 Hard Drive tray (as pictured)
For HP MSA1040 MSA2040 MSA2000/i and P2000 SAN Storage Arrays
Genuine HP serial number and MSA/MSA2 firmware
Genuine HP manufactured Hard Drive

Part Number(s)
Option Part# AJ740A
Option Part# AJ740B
Spare Part# 480942-001
Spare Part# 480942-002
Assembly Part# 481282-001
Model# ST31000340NS
Model# ST31000524NS

Note: 
For use in HP StorageWorks MSA/MSA2 Systems only.
Modular Smart Array (MSA) 2000/2000i Systems.
Modular Smart Array 2 (MSA2) 1040/2040/P2000 Systems.
Complete HDD compatibility table listed below.

Overview:
HP MSA2 / MSA2000 controller enclosures and large form factor expansion enclosures accept unique HP SATA disk drive modules with different firmware and different trays than other HP storage arrays and Proliant servers. The disk drives have SATA interposers attached to the back. The SATA interposers have active logic on them that will convert a single-ported SATA disk module into a dual-ported disk module. If you look closely, you will see a MULTIPLEXER chip on the interposer which is responsible for this function. Even though the SCA-40 connector is reminiscent of a connector on a Fibre Channel disk drive, no SATA-FC bridge chip exists on this interposer.