DNES-318350 IBM 18 GB 7.2K RPM 2MB Buffer Form Factor 3.5 Inches 80 Pin SCSI Hard Drive. Clean Tested.

Specification

Device Type Hard drive - internal
Width 4 in
Depth 5.7 in
Height 1 in

Hard Drive
Form Factor 3.5" x 1/3H
Capacity 18.3 GB
Interface Type Fast Wide SCSI
Connector 80 pin 
Buffer Size 2 MB

Performance
Drive Transfer Rate 40 MBps (external) / 30.5 MBps (internal)
Seek Time 7 ms (average) / 13 ms (max)
Track-to-Track Seek Time 0.8 ms
Average Latency 4.17 ms
Spindle Speed 7200 rpm

Expansion / Connectivity
Connections 1 x storage - Ultra2 Wide SCSI - 80 pin
Compatible Bays 1 x internal - 3.5" x 1/3H