Western Digital Caviar WD307AA 30GB 5.4K 3.5″ EIDE Hard Drive

Capacity: 30GB
Spindle Speed: 5,400RPM
Interface Type: IDE / ATA (3.5″)
Disk Size: 3.5″x1.0″ (LFF Hard Drive)
Sustained Throughput (MBps): 
Average Seek Time (read/write ms): 9.5 / 11.5
Electrical Interface Speed: EIDE / Ultra ATA/100 – 100MBps
On-Board Cache: 2MB

Physical Specifications
Formatted Capacity	30,758 MB
Interface	40-pin EIDE
Number of Disks	3
Data Surfaces	6
Number of Heads	6
Bytes Per SECTOR	512
User SECTORSPer Drive	60,074,754
Performance Specifications
Average Seek Read	9.5 ms typical, 15 ms maximum
Average Seek Write	11.5 ms typical, 17 ms maximum
Track-to-Track Seek	2.0 ms typical, 5 ms maximum
Full Stroke Seek	19 ms typical, 23 ms maximum
Average Latency	5.5 ms (nominal)
Rotational Speed	5400 RPM (nominal)
Buffer to Host	66.6 MB/s (Mode 4 Ultra ATA) 33.3 MB/s (Mode 2 Ultra ATA) 16.6 MB/s (Mode 4 PIO) 16.6 MB/s (Mode 2 multi-word DMA)
Buffer to Disk	157.98 Mbits/s minimum 271.0 Mbits/s maximum
Buffer Size	2 MB