Western Digital Caviar 40GB 7.2K SATA Hard Drive WD400BD
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Capacity: 40GB
Spindle Speed: 7,200RPM
Interface Type: SATA
Disk Size: 3.5″x1.0″ (LFF Hard Drive)
Sustained Throughput (MBps):
Average Seek Time (read/write ms): 8.9 / 10.9
Electrical Interface Speed: SATA 300 – 3.0Gbps
On-Board Cache: 2MB
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Western Digital Caviar 40GB 7.2K SATA Hard Drive WD400BD – BRAND New OEM
Compatibility
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| Performance Specifications |
| Rotational Speed |
7,200 RPM (nominal) |
| Buffer Size |
2 MB |
| Average Latency |
4.20 ms (nominal) |
| Contact Start/Stop Cycles |
50,000 minimum |
| Seek Times |
| Read Seek Time |
8.9 ms |
| Write Seek Time |
10.9 ms (average) |
| Track-To-Track Seek Time |
2.0 ms (average) |
| Full Stroke Seek |
21.0 ms (average) |
| Transfer Rates |
| Buffer To Host (Serial ATA) |
300 MB/s (Max) |
| Buffer To Disk |
748 Mbits/s (Max) |
| Physical Specifications |
| Formatted Capacity |
40,020 MB |
| Capacity |
40 GB |
| Interface |
SATA 300 MB/s |
| User SECTORS Per Drive |
78,165,360 |
| Physical Dimensions |
| English |
| Height |
1.028 Inches (Max) |
| Length |
5.787 Inches (Max) |
| Width |
4.00 Inches (+/- 0.010 inch) |
| Weight |
1.60 Pounds |
| Metric |
| Height |
26.1 mm (Max) |
| Length |
147 mm (Max) |
| Width |
101.6 mm |
| Weight |
0.73 kg |
| Environmental Specifications |
| Operating Shock (Read) |
65G, 2 ms |
| Non-operating Shock |
350G, 2 ms |
| Acoustics |
| Idle Mode |
30 dBA (average) |
| Seek Mode 0 |
32 dBA (average) |
| Seek Mode 3 |
31 dBA (average) |
| Temperature (English) |
| Operating |
41° F to 131° F |
| Non-operating |
-40° F to 149° F |
| Temperature (Metric) |
| Operating |
5° C to 55° C |
| Non-operating |
-40° C to 65° C |
| Humidity |
| Operating |
5-95% RH non-condensing |
| Non-operating |
5-95% RH non-condensing |
| Altitude (English) |
| Operating |
-1,000 feet to 10,000 feet |
| Non-operating |
-1,000 feet to 40,000 feet |
| Altitude (Metric) |
| Operating |
-305M to 3,050M |
| Non-operating |
-305M to 12,200M |
| Operating Vibration |
| Linear |
10-300 Hz, 3.0G (0 to peak) |
| Random |
10-300 Hz, 0.008 g² / Hz |
| Non-operating Vibration |
| Low Frequency |
5-20 Hz, 0.195 inches (double amplitude) |
| High Frequency |
20-300 Hz, 4.0G (0 to peak) |
| Electrical Specifications |
| 12 VDC Current Requirements |
| Read/Write |
450 mA |
| Idle |
470 mA |
| Standby |
23 mA |
| Sleep |
23 mA |
| 5 VDC Current Requirements |
| Read/Write |
800 mA |
| Idle |
750 mA |
| Standby |
330 mA |
| Sleep |
200 mA |
| Power Dissipation |
| Read/Write |
12.80 Watts |
| Idle |
9.50 Watts |
| Standby |
1.90 Watts |
| Sleep |
1.30 Watts |
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