The Hitachi E5K160 2.5-inch hard drive is a high-capacity, high-performance, low-power drive designed for 24/7 operation in low-transaction environments. It features Hitachi's Vertical Magnetic Recording (PMR) technology, which provides extremely low soft error rates and excellent corrosion resistance. The E5K160 also offers 540 Mb/sec internal transfer rates and has been proven to offer the best application performance among 5400RPM drives in PCMark tests.