Western Digital WD5000AAKS 500GB SATA/300 7200RPM 16MB Hard Drive Western Digital Caviar WD5000AAKS 500 GB SATA Hard Drive General Features: 500 GB capacity 7200 RPM spindle speed 16 MB buffer Serial ATA interface SATA/300 transfer rate 4.2 ms average latency 8.9 ms average read seek 10.9 ms average write seek 3.5-inch form factor Power Specifications: +5V, 0.68A +12V, 0.55A Regulatory Approvals: cULus CE MIC C-Tick BSMI TUV