WD 12TB Ultrastar DC HC520 7200 rpm SATA III 3.5" Internal Data Center HDD (ISE Security, 512e Formatting)

Featuring a helium-filled design, traditional perpendicular magnetic recording (PMR) technology, and up to 6 Gb/s SATA III interface, the 12TB Ultrastar DC HC520 7200 rpm 3.5" Internal Data Center HDD makes it easy to expand the capacity of your data center and other enterprise systems. With 256MB of cache, this 7200 rpm hard drive is designed to deliver sustained transfer speeds of up to 255 MB/s. HelioSeal technology provides greater capacity, reliability, and power efficiency compared to previous generations that are filled with air.