Western Digital 80 GB 5400rpm SATA 8MB 2.5-Inch Notebook Hard Drive WD800BEVT (Scorpio Blue) Rotational Speed: 5,400 RPM (nominal) Buffer Size: 8 MB Average Latency: 5.50 ms (nominal) Read Seek Time: 12.0 ms Track-To-Track Seek Time: 2.0 ms (average)