0A57913 Hitachi Travelstar 320GB 5.4K RPM 8MB Buffer 2.5 Inches Form Factor SATA300 Notebook Hard Drive. New Factory Sealed with 3 years Manufacturer warranty.

Specification
Form Factor 2.5" x 1/6H 
Capacity 320 GB 
Interface Type Serial ATA-300 
Buffer Size 8 MB 
Features TrueTrack servo technology, Thermal Flyheight Control (TFC) 

Performance
Drive Transfer Rate 300 MBps (external) / 109 MBps (internal) 
Seek Time 12 ms (average) / 20 ms (max) 
Track-to-Track Seek Time 1 ms 
Average Latency 5.5 ms 
Spindle Speed 5400 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 1/6H