Western Digital WD5002ABYS RE3 3.5-inch Enterprise SATA Hard Drive (500 GB, 1.2 million hours MTBF, 16 MB Cache, 7200 RPM)

WD RE3 7200 RPM Enterprise SATA hard drives are packed with performance features including a SATA 3 Gb/s interface, up to 32 MB cache, and an ultra-fast dual processor. Enhanced reliability features, including 4th generation RAFF technology make these drives the easy choice for servers, storage arrays, video surveillance, and other demanding write-intensive applications. Backed by a 5-year limited warranty in capacities up to 1 TB.