13G1591 Hitachi TravelStar 100 GB 5.4K RPM 8MB Buffer 2.5 Inches Form Factor ATA-IDE Notebook Hard Drive. New Retail factory sealed with full manufacturer warranty.

Specification
Designation: Laptop Computer
Capacity: 100 GB
Interface : IDE/EIDE
Enclosure: Internal
HDD Form Factor: 2.5" Ultra Slim Line
Spindle Speed: 5400 RPM

Technical Features 
Internal Data Transfer Rate : 493 Mbit/s
External Data Transfer Rate: 100 MBps
Seek Time: 12 ms
Buffer Size: 8 MB
Average Latency: 5.56 ms
Interface (Detailed): DMA/ATA-100 (Ultra)
Sound Emission: 25 dB