Western Digital Corp. WD400JB hard drive specifications

Western Digital Caviar SE EIDE 40 GB Hard Drive

WD Caviar 7200 hard drives deliver data to users faster than any desktop hard drive before, being a perfect solution for activities requiring high-performance storage such as computer gaming, digital video editing, and file server applications. The WD Caviar Special Edition family is equipped with an 8 MB buffer - the largest buffer available today in a desktop EIDE hard drive, delivering data to users faster than any hard drive in its class. Data Lifeguard is an expanded set of data protection tools that includes shock protection, an environmental protection system, and embedded error detection and repair features that automatically find, isolate, and repair problem areas that may develop over the extended use of the hard drive. With these enhanced data reliability features, the drive can perform more accurate monitoring and error repair and deliver exceptional data security.

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Manufacturer
Western Digital Corp.

HDD Part Number
WD400JB


Hard drive health monitoring software
ActiveSMART by Ariolic Software. Click to download ActiveSMART

General

Device Type
Hard drive - Internal hard drive

Width
4 in

Depth
5.8 in

Height
1 in

Weight
0.9 lbs

Hard Drive

Form Factor

Capacity
40 GB

Interface Type
ATA-100

Buffer Size
8 MB

Features
Shock Guard, Data Lifeguard

Performance

Drive Transfer Rate
100 MBps

Internal Data Rate
73.9 MBps

Seek Time
8.9 ms (average) / 21 ms (max)

Track-to-Track Seek Time
2 ms

Average Latency
5.5 ms

Spindle Speed
7200 rpm

Reliability

Storage Hard Drive / Non-Recoverable Errors
1 per 10^15

Start / Stop Cycles
50,000

Storage Controller

Type
None

Expansion / Connectivity

Interfaces
1 x ATA-100 - 40 pin IDC

Compatible Bays
1 x Internal - 3.5" x 1/3H

Compatible Slots
x None

Miscellaneous

Compliant Standards
RoHS

Power

Power Device
None

Software / System Requirements

OS Required
Microsoft Windows 2000 / XP , Microsoft Windows Vista

Environmental Parameters

Humidity Range Operating
5 - 85%

Shock Tolerance
20 g @ 2ms half-sine pulse (operating) / 200 g @ 2ms half-sine pulse (non-operating)

Vibration Tolerance
0.75 g @ 20-300 Hz (operating) / 4 g @ 20-500 Hz (non-operating)

Sound Emission
35 dBA

Max Altitude Operating
9840 ft


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