Specifications: Category Seagate HardDrive Sub-Category 7.2K Generation SATA Part Number ST91000640NS Capacity 1TB Form Factor 2.5 inches x 1/3H Interface Serial ATA Rotational Speed 7200RPM Data Transfer Rate 600MB/s Average Seek Time 8.5ms Hot Swap Tray Not Included Manufacturer Seagate Ports Single Cache 64MB