HGST Ultrastar 3.5-Inch 1TB 7200RPM SATA II 16 MB Cache Enterprise Hard Drive with 24x7 Duty Cycle (0A39289) Combining 7200 rpm performance and granular power control Enhanced rotational vibration safeguard (rvs) for robust performance in multi-drive environments 24x7 enterprise-class duty cycle 3GB/s SATA for configuration flexibility Enhancing data safety and security 1 terabytes of capacity 3Gb/s SATA for configuration flexibility Cloud storage technology Enhanced Rotational Vibration Safeguard (RVS) for robust performance in multi-drive 24x7 enterprise-class duty cycle