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| Specifications for the 20GB EIDE drive (model WD200EB). | ||||||||||||||
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| Specifications for the 20GB EIDE drive (model WD200EB). | ||||||||||||||
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Specifications for the WD Protégé ® WD200EB
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| Physical Specifications | |
| Formatted Capacity 1 | 20,020 MB |
| Interface | 40-pin EIDE |
| Actuator Type | Rotary Voice Coil |
| Number of Disks | 1 |
| Data Surfaces | 2 |
| Number of Heads | 2 |
| Bytes Per Sector | 512 |
| User Sectors Per Drive | 39,102,336 |
| Servo Type | Embedded |
| Recording Method EPR4 | Rate 16/17 PRML |
| ECC | Reed Solomon |
| Head Park 2 | Automatic |
| Performance Specifications | |
| Average Seek - Read - Write | 12.1 ms (typical), 19 ms (maximum) 13 ms (typical), 20 ms (maximum) |
| Track-to-Track Seek | 2.0 ms (typical), 5.0 ms (maximum) |
| Full Stroke Seek | 25 ms (typical), 32 ms (maximum) |
| Index Pulse Period | 8.3 ms (nominal) |
| Average Latency | 5 ms (nominal) |
| Rotational Speed | 5400 RPM (nominal) |
| Controller Overhead | 0.3 ms (average) |
| Data Transfer Rate (maximum) - Buffer to Host - Buffer to Disk | 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) 192 Mbits/s minimum 320 Mbits/s maximum |
| Interleave | 1:1 |
| Buffer Size | 2 MB |
| Error Rate - Unrecoverable | <1 in 1014 bits read |
| Spindle Start Time - From Power-on to Drive Ready 1 - From Power-on to Rotational Speed 2 | 4 s (typical), 8 s (maximum) 2.5 s (typical), 4 s (maximum) |
| Contact Start/Stop Cycles (CSS) | 40,000 minimum |
1 Defined as the time from power-on to the setting of the Drive Ready and Seek Complete including calibration.
2 Defined as the time from power-on to when the full spindle rotational speed is reached.
