HGST, a Western Digital company ULTRASTAR C10K1800 600GB 10000RPM SAS ULTRA 512N SE Enterprise Hard Drive SAS 128 MB Cache 2.5-Inch Internal Bare or OEM Drives, (0B31229) 10K RPM SAS 12Gb/s Media cache architecture Rotational Vibration Safeuard (RVS) Workload detector technology