Specifications:Category Seagate HardDriveSub-Category 7.2KGeneration SASPart Number ST91000640SSProducts ID 466558Capacity 1TBInterface Serial Attached SCSI 2Enclosure InternalDrive Dimensions 2.5 inchesSpindle Speed 7200RPMData Transfer Rate 600MB/sSeek Time 8.5msHotSwap YesManufacturer SeagatePre-Failure Warranty YesHot Swap Tray Not IncludedPorts Dual PortCache 64MB