IC25N040ATCS05-0 Hitachi TravelStar 40 GB 5.4K RPM 8MB Buffer 2.5 Inches Form Factor ATA-IDE Notebook Hard Drive. New Pull.

Specification
Device Type Hard drive - internal
Width 2.8 in
Depth 3.9 in
Height 0.4 in
Weight 0.2 lbs

Hard Drive
Form Factor 2.5" x 1/8H
Capacity 40 GB
Interface Type ATA-100
Buffer Size 8 MB
Features Fluid Dynamic Bearing (FDB) motor, Partial Response Maximum Likelihood (PRML), giant magnetoresistive (GMR) head technology, load/unload technology, Enhanced Adaptive Battery Life Extender 3.0, TrueTrack servo technology, antiferromagnetically-coupled (AFC) media
Compliant Standards S.M.A.R.T., 320-bit Reed Solomon ECC

Performance
Drive Transfer Rate 100 MBps (external) / 37.1 MBps (internal)
Seek Time 12 ms (average) / 23 ms (max)
Track-to-Track Seek Time 2.5 ms
Average Latency 5.5 ms
Spindle Speed 5400 rpm

Expansion / Connectivity
Connections 1 x storage - ATA-100 - 44 pin IDC
Compatible Bays 1 x internal - 2.5" x 1/8H