Hitachi Travelstar 5K250 250GB SATA/150 5400RPM 8MB 2.5" Hard Drive Hitachi Travelstar 5K250 HTS542525K9SA00 Hard Drive General Features: 250 GB storage capacity Serial ATA/150 interface 8 MB data buffer 5400 RPM rotational speed 5.5 ms average latency 665 Mbits/sec maximum media transfer rate 150 Mb/s maximum media transfer rate 11 ms average read seek time 1 ms average read track to track time 20 ms full stroke seek time TrueTrack Technology for tracking accuracy in high shock or vibration environments