More Value to the Data Centre with Maximum Capacity, Power Efficiency and Reliability Laying the foundation for a worry-free data centre, Western Digital delivers capacity to conquer the data explosion - Ultrastar(R) DC HC520, previously known as Ultrastar He12 and part of our HC500 series of helium-filled hard drives. Designed to handle workloads up to 550 TB per year, the Ultrastar DC HC520 is the industry\'s first 12 TB drive and uses traditional perpendicular magnetic recording (PMR) technology to make it drop-in ready for any enterprise-capacity application or environment. The stable internal environment created by fourth-generation Helio Seal(R) technology enables a new 8-disk design, increasing the capacity by 20% when compared to the 7-disk design of the prior generation, Ultrastar DC HC510. This high capacity helium drive offers one of the lowest power profiles in the industry to help data centre architects meets eco-environmental goals and requirements. Targeted at 2. 5M hours MTBF, the Ultrastar DC HC520 provides the highest reliability rating available of all HDDs on the market today by building on the successful design of its 10 TB, 8 TB and 6 TB predecessors. Trust Western Digital and the Ultrastar DC HC520 to deliver more capacity, more efficiency, more reliability and more value to your data centre. Helio Seal Technology Helps Solve Challenges Facing Next Generation Data Centres Data centres are facing growing pressures. Data volume is expanding, operating costs are rising, yet budgets remain flat. Lowering the total cost of ownership (TCO) has become the focus of data centre architects and the Ultrastar DC HC520 provides the best value proposition and greatest storage efficiency available. Compared to 8TB Ultrastar air-filled drives, this Helio Seal hard drive provides 50% more capacity, uses 52% less power (Watts/TB), and is 25% more reliable, rated at 2. 5M hours MTBF. Datacentre ready features like a second generation dual-stage actuator--the Western D