WesterDigtial 320GB Scorpio 2.5-inch SATA Hard Drive 8 MB Cache 5400 RPM

Rotational Speed 5,400 RPM
Buffer Size 8 MB
Average Latency 5.50 ms

Seek Times
Read Seek Time 12.0 ms
Track-To-Track Seek Time 2.0 ms

Buffer To Host (Serial ATA) 3 Gb/s (Max)
Transfer Rate (Buffer To Disk) 850 Mbits/s (Max)

WD3200BEVT$109.99