WD Gold Enterprise Class SATA Hard Drive 20TB WD201KRYZ Features: Take on tough workloads; up to 10 times the typical desktop rates Enhanced reliability with up to 2.5M hours MTBF Specifically designed for use in enterprise-class storage systems and data centers 20TB on a 9-disk CMR drive utilizing the first implementation of OptiNAND technology’s capacity-enabling features Energy-assisted magnetic recording (EAMR) and triple-stage actuator (TSA) (in 16TB capacities and above) Specifications: Form Factor 3.5-inch Interface SATA 6 Gb/s 512n / 512e user sectors per drive 512e Formatted Capacity 20TB RoHS compliant Yes Data Transfer Rate (max Sustained) 269MB/s Performance (RPM) 7200 Cache 512MB MTBF (hours, projected) 2,500,000 Limited Warranty 5 years