0A57547 Hitachi TravelStar 320GB 7.2K RPM 16MB Buffer 2.5 Inches Form Factor SATA300 Notebook Hard Disk Drive. New Pull.

Specification
Form Factor 2.5" x 1/8H 
Capacity 320 GB 
Interface Type Serial ATA-300 
Buffer Size 16 MB 
Features TrueTrack servo technology, Thermal Flyheight Control (TFC) 

Performance
Drive Transfer Rate 300 MBps (external) 
Internal Data Rate 142 MBps 
Seek Time 12 ms (average) / 20 ms (max) 
Track-to-Track Seek Time 1 ms 
Average Latency 4.2 ms 
Spindle Speed 7200 rpm 

Reliability
Start / Stop Cycles 600,000 

Expansion / Connectivity
Interfaces 1 x Serial ATA-300 - 7 pin Serial ATA 
Compatible Bays 1 x internal - 2.5" x 1/8H