WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4)

WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) Recording Technology: CMR Average Latency: 4.16ms Features: Up to 18TB capacity in a standard 3.5-inch form factor Industry's first Energy-Assisted Magnetic Recording technology Industry's first Triple Stage Actuator Leading HelioSeal technology Reliable, field-proven design across five generations HelioSeal design delivers power efficiency (Watts/TB) 2.5M hours MTBF rating Usage: For Enterprise Storage Height (maximum): 26.10mm Width (maximum): 101.60mm Length (maximum): 147.00mm