The barracuda 7200.10 Is the most reliable disc drive around. New perpendicular recording technology supports vertically stored data bits, enabling increased areal density and dependability for workstations and performance pcs. This is an oem drive. Features: perpendicular recording: perpendicular recording increases data density while decreasing moving parts for a more dependable drive. Adaptive fly height: adaptive fly height offers consistent read/write performance from the beginning to end of your computing workloads. Clean sweep: clean sweep automatically calibrates your drive each time you power up. Directed offline scan: directed offline scan runs diagnostics when storage access is not required. Seagate softsonic: seagate softsonic motor enables whisper-quiet operation. Enhanced g-force: enhanced g-force protection defends against handling damage. 5 Year warranty: the product carries an unprecedented five-year warranty. Specifications: model number: st3500630a. Capacity: 500 gb. Speed: 7200 rpm. Seek time: n/a ms avg. Interface: ultra ata/100. Cache: 16mb.