| Western Digital Raptor WD740GD |
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| Performance Specifications | ||
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Rotational Speed | 10,000 RPM (nominal) |
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Buffer Size | 8 MB |
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Average Latency | 2.99 ms (nominal) |
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Contact Start/Stop Cycles | 20,000 minimum |
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| Seek Times | ||
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Read Seek Time | 4.5 ms |
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Write Seek Time | 5.9 ms (average) |
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Track-To-Track Seek Time | 0.6 ms (average) |
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Full Stroke Seek | 10.2 ms (average) |
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| Transfer Rates | ||
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Buffer To Host (Serial ATA) | 1.5 Gb/s (Max) |
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Buffer To Disk | 72 MB/s (Sustained) |
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| Recommended Configuration Parameters | ||
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Number of Heads (Physical) | 4 |
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| Physical Specifications | ||
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Formatted Capacity | 74,356 MB |
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Capacity | 74 GB |
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Interface | SATA 150 MB/s |
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Actuator Type | Rotary Voice Coil |
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Number of Platters | 2 |
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Bytes Per Sector | 512 |
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User Sectors Per Drive | 145,226,112 |
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Servo Type | Embedded |
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| Physical Dimensions | ||
| English | ||
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Height | 1.028 Inches (Max) |
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Length | 5.787 Inches (Max) |
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Width | 4.00 Inches (+/- 0.010 inch) |
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Weight | 1.60 Pounds (+/- .10 lb) |
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| Metric | ||
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Height | 26.1 mm (Max) |
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Length | 147 mm (Max) |
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Width | 101.6 mm |
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Weight | 0.73 kg (+/- .082 kg) |
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| Environmental Specifications | ||
| Shock | ||
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Operating Shock (Read) | 65G, 2 ms |
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Non-operating Shock | 250G, 2 ms |
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| Acoustics | ||
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Idle Mode | 32 dBA (average) |
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Seek Mode 0 | 36 dBA (average) |
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| Temperature (English) | ||
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Operating | 41°F to 131°F |
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Non-operating | -40°F to 149°F |
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| Temperature (Metric) | ||
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Operating | 5°C to 55°C |
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Non-operating | -40°C to 65°C |
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| Humidity | ||
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Operating | 5-95% RH non-condensing |
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Non-operating | 5-95% RH non-condensing |
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| Altitude (English) | ||
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Operating | -1,000 feet to 10,000 feet |
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Non-operating | -1,000 feet to 40,000 feet |
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| Altitude (Metric) | ||
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Operating | -305M to 3,050M |
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Non-operating | -305M to 12,200M |
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| Vibration | ||
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Operating | |
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Linear |
10-300 Hz, 3.0G (0 to peak) |
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Random |
10-300 Hz, 0.008 g2 / Hz |
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Non-operating | |
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Low Frequency |
5-20 Hz, 0.195 inches (double amplitude) |
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High Frequency |
10-300 Hz, 5.0G (0 to peak) |
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| Electrical Specifications | ||
| Current Requirements | ||
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12 VDC | |
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Read/Write |
349 mA |
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Idle |
338 mA |
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Standby |
15.9 mA |
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Sleep |
16 mA |
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5 VDC | |
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Read/Write |
706 mA |
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Idle |
770 mA |
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Standby |
314 mA |
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Sleep |
184 mA |
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Power Dissipation | |
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Read/Write |
8.40 Watts |
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Idle |
7.90 Watts |
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Standby |
1.76 Watts |
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Sleep |
1.11 Watts |