WD 22 TB Ultrastar DC HC570 3.5" SATA 6Gbps Internal Data Center HDD,Up to 600 MB/s Data Transfer Rate, 512MB Cache, 2.5 Million Hours MTBF, 600000 Load/Unload Cycles: The 22TB Ultrastar 7200 rpm SATA 3.5" Internal Data Center HDD from WD is an enterprise-grade drive designed for demanding 24x7 data storage solutions. Ultrastar drives are built to be durable, using CMR technology and featuring up to an error tolerance of &a