IC25N020ATDA04 IBM 20 GB 4.2K RPM Form Factor 2.5 Inches 2MB Buffer ATA-IDE Notebook Hard Drive. New Bulk Pack.

Specification
Device Type Hard drive - internal
Width 2.8 in
Depth 3.9 in
Height 0.4 in
Weight 3.5 oz

Hard Drive
Form Factor 2.5"
Capacity 20 GB
Interface Type ATA-100
Buffer Size 2 MB
Features Fluid Dynamic Bearing (FDB) motor, Partial Response Maximum Likelihood (PRML), giant magnetoresistive (GMR) head technology
Compliant Standards S.M.A.R.T.

Performance
Drive Transfer Rate 100 MBps (external) / 27 MBps (internal)
Seek Time 12 ms (average) / 23 ms (max)
Track-to-Track Seek Time 2.5 ms
Average Latency 7.1 ms
Spindle Speed 4200 rpm

Reliability
Non-Recoverable Errors 1 per 10^13
Start / Stop Cycles 300,000

Expansion / Connectivity
Interfaces 1 x ATA-100 - 44 pin IDC
Compatible Bays 1 x internal - 2.5"