Western Digital Corp. WD1200JB hard drive specifications

Western Digital Caviar SE EIDE 120 GB Hard Drive

WD Caviar 120 GB Special Edition, the latest addition to Western Digital's reliable, award-winning hard drive family, is designed to maximize desktop computer performance for activities requiring high-performance hard drives such as computer gaming, digital video editing, and file server applications. The WD Caviar 120 GB Special Edition is equipped with an 8 MB buffer - the largest buffer available today in a 7200 RPM desktop EIDE hard drive, delivering data to users faster than any hard drive in its class. The Special Edition hard drive provides a higher percentage of cache hits than industry-standard 2 MB versions. Within the complex operations of hard drives, the buffer is used to hold the results of recent reads from the disk, and also to "pre-fetch" information that is likely to be requested in the near future. The use of an increased buffer improves the performance by reducing the number of physical accesses to the disk and allowing data to stream from the disk uninterrupted by mechanical operations.

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Manufacturer
Western Digital Corp.

HDD Part Number
WD1200JB


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
120 GB

Interface Type
ATA-100

Buffer Size
8 MB

Bytes per Sector
512

Features
Data Lifeguard

Compliant Standards
S.M.A.R.T.

Performance

Drive Transfer Rate
100 MBps

Internal Data Rate
75.3 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
50,000

Storage Controller

Type
None

Expansion / Connectivity

Connections
1 x Storage - ATA-100 - 40 pin IDC

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

Compatible Slots
x None

Miscellaneous

Package Type
OEM

Power

Power Device
None

Manufacturer Warranty

Service & Support
3 years warranty

Service & Support Details
Limited warranty - 3 years

Environmental Parameters

Min Operating Temperature
41 �F

Max Operating Temperature
131 �F

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
39 dBA

Max Altitude Operating
9840 ft


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