X300 Performance Hard Drive 18TB HDWR51JUZSVA Features: 3.5" SATA Hard Drive 7200 rpm 256/512 MB buffer Toshiba Dynamic Cache Technology Toshiba Stable Platter Technology Specifications: Basic Specifications Form factor 3.5-inch Interface SATA 6.0 Gbit/s Advanced Format (AF) yes RoHS compatible yes Halogen Free Yes Shock Sensor yes Performance Rotational speed 7,200 rpm Buffer size 512 MB Average latency 4.17 ms Native Command Queing (NCQ) supported Reliability MTTF 600,000 hours Unrecoverable error rate 1 per 10¹⁴ bits read Power Management Consumption (operating) 7.48 W typ. Consumption - Active Idle 4.14 W typ. Environmental Vibration (operating) 10 TB Vibration (non-operating) 29.4 m/s2 (3.0 G) (5 to 500Hz) Shock (operating) 686 m/s² (70 G) / 2 ms duration Shock (non-operating) 2450 m/s² (250 G) / 2 ms duration Acoustics (idle mode) 20 dB typ. Physical Dimensions 147 (L) x 101.85 (W) x 26.1 (H) mm Weight (approx.) 720 g max.