HPE 605835-B21 is a 1TB hard drive for server storage. Its 2.5-inch SFF format and SAS interface identify it as a compact drive for compatible server bays.
The drive uses a 6G SAS connection and is rated at 7,200 rpm. HPE identifies it as a Dual Port Midline model, suited to storage configurations built around that drive type.
HPE lists it in the hot-plug SFF Midline category and includes it among the drive options supported by the ProLiant ML350 Generation 6. This gives a confirmed server reference for the model.