WD RE4 2TB Hard drives combine up to Intellipower technology, 64 MB cache with SATA 3 Gb/s transfer rate for lightning-fast performance in demanding server and storage applications. Technologically advanced acoustics minimize noise. Cool drive operation and enhanced reliability features help protect the drive and the data stored on it. Maximum performance. Dual processor technology, up to 64 MB cache and SATA 3 Gb/s interface takes everything we know about 7200 RPM performance and turns it on its ear. No compromises. High performance, high capacity, best-in-class reliability, and cutting edge technology make up WD RE4 Enterprise HDD, the ideal drive for those who demand only the best. High Performance Electronics Architecture. Dual processor - Twice the processing power to maximize performance. Colossal cache - Bigger, faster cache of up to 64 MB means faster performance. Interface - WD RE hard drives are offered with a SATA 3 Gb/s interface. Rock Solid Mechanical Architecture. Dual actuator technology - A head positioning system with two actuators that improves positional accuracy over the data track(s). The primary actuator provides coarse displacement using conventional electromagnetic actuator principles. The secondary actuator uses piezoelectric motion to fine tune the head positioning to a higher degree of accuracy.