Reliability, capacity, power efficiency and performance for a multitude of Datacentre-specific applications. Robust storage with 24/7 premium customer support. For the most demanding datacentre environments, from entry-level servers to high end enterprise storage systems. Designed to handle workloads up to 550TB per year, which is among the highest workload capability of any 3.5-inch hard drive. One of the highest levels of reliability and durability for 24x7x365 operation within the most demanding storage environments. All WD Gold hard drives are extensively tested across a variety of popular OEM storage systems, SATA controllers, and host bus adapters, to ensure ease of integration for a plug and play solution. The primary actuator provides coarse displacement; the secondary actuator fine tunes the head positioning to a higher degree of accuracy. Reduces drive fallout caused by the extended hard drive error-recovery processes common to desktop drives. Dedicated 24x7 over the phone support is included with every WD Gold hard drive.