Western Digital Caviar EIDE 40 GB Hard Drive WD400BB | WD400BB | 30 GB to 49 GB

Description

Features

Specifications

Western Digital's WD Caviar 7200 RPM EIDE hard drives are the performance champions for advanced desktop personal computers.

Performance Specifications
Rotational Speed	7,200 RPM (nominal)
Buffer Size	2 MB
Average Latency	4.20 ms (nominal)
Contact Start/Stop Cycles	40,000 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 Disk	400 Mbits/s (Max)
Buffer to Host (EIDE)	Mode 5 Ultra ATA: 100.0 MB/s Mode 4 Ultra ATA: 66.6 MB/s Mode 2 Ultra ATA: 33.3 MB/s Mode 4 PIO: 16.6 MB/s Mode 2 multi-word DMA: 16.6 MB/s
Recommended Configuration Parameters
Cylinders	16,383
Number of Heads (Logical)	16
Number of Heads (Physical)	4
Sectors Per Track	63
Physical Specifications
Formatted Capacity	40,021 MB
Capacity	40 GB
Interface	EIDE
Actuator Type	Rotary Voice Coil
Number of Platters	2
Bytes Per Sector	512
User Sectors Per Drive	78,165,360
Servo Type	Embedded
Physical Dimensions
English	Height: 1.028 Inches (Max) Length: 5.787 Inches (Max) Width: 4.00 Inches (+/- 0.010 inch) Weight: 1.32 Pounds (+/- .10 lb)
Metric	Height: 26.1 mm (Max) Length: 147 mm (Max) Width: 101.6 mm Weight: 0.6 kg (+/- .082 kg)
Environmental Specifications
Shock	Operating Shock (Read): 65G, 2ms Non-operating Shock: 250G, 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 140° F
Temperature (Metric)	Operating: 5° C to 55° C Non-operating: -40° C to 60° C
Humidity	Operating: 5-85% 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
Vibration - Operating	Linear: 5-500 Hz, 0.25G (0 to peak) Random: 10-300 Hz, 0.004 g² / Hz
Vibration - Non-operating	Low Frequency: 5-20 Hz, 0.195 inches (double amplitude) High Frequency: 20-500 Hz, 4.0G (0 to peak)
Electrical Specifications
Current Requirements	12 VDC - Read/Write: 350 mA - Idle: 340 mA - Standby: 25 mA - Sleep: 25 mA 5 VDC - Read/Write: 630 mA - Idle: 610 mA - Standby: 190 mA - Sleep: 80 mA Power Dissipation - Read/Write: 7.50 Watts - Idle: 7.10 Watts - Standby: 1.30 Watts - Sleep: 0.70 Watts

Western Digital Caviar EIDE 40 GB Hard Drive WD400BB | WD400BB

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