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The Ultrastar C15K146 completes the HGST portfolio of performance drives for Enterprise-class applications in the mission critical storage tier, This 15,000 RPM, small form factor drive is ideal for high-performance 24x7 Enterprise applications. Compared to similar 3.5-inch drives from HGST, sequential performance is 29% higher, and 11% higher when compared to its 10K RPM sibling. The 64MB cache buffer is the largest available in its class in the industry. In addition, Advanced Power Management technology optimizes power consumption which can lower data center energy usage and cooling costs. This drive uses 50% less power than similar 3.5-inch drives in the HGST lineup. The Ultrastar C15K147 drive is designed on the same platform as its 10K RPM sibling to reduce qualification time.