Description:
HP MSA/MSA2 2TB 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 DrivePart Number(s)
Option Part# AW556A
Spare Part# 601778-001
Assembly Part# 507631-003
Model# ST32000644NSNote:
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.