Western Digital RE4 Green Power, 2TB, 64MB Cache, SATA II 3.0Gbps, 1.2 million hours MTBF, IntelliPower, OEM. This new generation of WD RE-GP drives takes advantage of the performance improvements offered in our WD RE3 family of drives and adds advanced power management technology to deliver a faster, greener solution for large-scale data centers. With improved performance, lower power consumption and higher capacity, this new generation of WD RE-GP drives provides even lower cost-of-ownership to organizations with large data centers.