The Dell Ultrastar DC HC520 is a 12TB internal hard disk drive designed for enterprise use. It has a rotation speed of 7200 RPM, a storage format of 512e, and is compatible with various devices such as NAS, PC, server, and CCTV. It features dual safe firmware, power-disable, rebuild assist mode, ISE, PMR technology, dual-stage micro actuator, media cache plus architecture, rotational vibration safeguard, and instant secure erase. The unit comes with a 256 MB cache and a SATA III interface.

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