| Physical Specifications |
| Manufacturer |
Western Digital |
| Manufacturer model |
WD1200BB |
| Formatted capacity |
120,034 MB |
| Interface |
40-pin EIDE |
| Actuator type |
Rotary Voice Coil |
| Number of Disks |
3 |
| Data Surfaces |
6 |
| Number of Heads |
6 |
| Bytes per sector |
512 |
| User sector per drive |
234,441,648 |
| Servo Type |
Embedded |
| Recording Method EPR4 |
Rate 16/17 PRML |
| ECC |
Reed Solomon |
| Head Park |
Automatic |
| Average Seek (read) |
8.9 ms average |
| Average Seek (write) |
10.9 ms average |
| Track to Track Seek |
2.0 ms average, 5 ms maximum |
| Full Stroke Seek |
21 ms average |
| Index Pulse Period |
8.3 ms (nominal) |
| Average Latency |
4.2 ms (nominal) |
| Rotational Speed |
7200 RPM (nominal) |
| Data Transfer Rate (Buffer to Host) |
100 MB/s (Mode 5 Ultra ATA)
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) |
| Transfer Rate (Buffer to Disk) |
525 Mbits/s maximum |
| Interleave |
1:1 |
| Buffer Size |
2 MB |
Spindle Start Time
From Power-on to Drive Ready |
7.0s average, 9.0s maximum |
Spindle Start Time
From Power-on to Rotational Speed |
5.0s average, 7.0s maximum |
| Spindle Stop Time |
6.5s average |
| Contact Start/Stop Cycles (CSS) |
50,000 minimum |
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