Western Digital Corp. WD400LB hard drive specifications

WD Caviar WD400LB - hard drive - 40 GB - ATA-100

The latest generation of Western Digital's award-winning WD Caviar Enhanced IDE (EIDE) hard drive family features new firmware innovations to achieve 80 GB per platter. Spinning at 7200 RPM and offering capacities as large as 250 GB, the latest WD Caviar hard drives combine the high performance and increased areal density required by today's capacity-hungry applications.

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Manufacturer
Western Digital Corp.

HDD Part Number
WD400LB


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
1.3 lbs

Hard Drive

Form Factor

Capacity
40 GB

Interface Type
ATA-100

Buffer Size
2 MB

Features
Shock Guard, Data Lifeguard

Performance

Drive Transfer Rate
100 MBps

Internal Data Rate
50 MBps

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

Track-to-Track Seek Time
2 ms

Average Latency
4.2 ms

Spindle Speed
7200 rpm

Reliability

Storage Hard Drive / Non-Recoverable Errors
1 per 10^14

Start / Stop Cycles
40,000

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

Power

Power Device
None

Environmental Parameters

Min Operating Temperature
41 �F

Max Operating Temperature
131 �F

Humidity Range Operating
5 - 85%

Vibration Tolerance
0.25 g @ 5-500 Hz (operating) / 4 g @ 20-500 Hz (non-operating)

Sound Emission
35 dBA

Max Altitude Operating
9840 ft


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