Western Digital WD2500JB 250GB IDE Hard Drive

Part# 810939


Western Digital WD2500JB 250GB IDE Hard Drive


Western Digital WD2500JB 250GB IDE Hard Drive  

Western Digital’s Special Edition WE2500JB hard drive is designed to maximize desktop computer performance for activities requiring high-performance storage such as computer gaming, digital video editing, and file server applications. Offering capacities as large as 250 GB, the Western Digital’s 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.

Your new Western Digital hard drive comes with an IDE interface cable, mounting screws, jumpers, installation poster, and Data Lifeguard Tools installation software and utilities.


Superior Performance
The Special Edition hard drive provides a higher percentage of cache hits and significantly faster time to data 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.

Data Protection Enhancements
Data Lifeguard™ is an expanded set of protection tools which include 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.

Data Lifeguard Tools™ is a set of software utilities that work in conjunction with the embedded Data Lifeguard features to make hard drive installation, drive management diagnostics, and repair simple and worry-free.

IMPORTANT: Use Data Lifeguard Tools 10.0 or later installation software to access the full capacity of your hard drive. Hard drives larger than 137 GB require a controller card to utilize full drive capacity.


Formatted Capacity 250,059 MB (250GB)
Interface 40-pin EIDE
Form Factor 3.5-inch
Actuator Type Rotary Voice Coil
Bytes Per Sector (STD) 512
User Sectors Per Drive 488,397,168
Average Latency 4.2 ms
Rotational Speed 7200 RPM
Data Transfer Rate (Buffer to Host) 100 MB/s (Mode 5 Ultra ATA)
66.6 MB/s (Mode 4 Ultra ATA)
33.3 MB/s (Mode 2 Ultra ATA)
16.6 MB/s (Mode 4 PIO)
16.6 MB/s (Mode 2 multi-word DMA)
Buffer Size 8 MB
Height 1.028 in. (26.1 mm) max
Length 5.787 in. (147.0 mm) max
Width 4.0 in. (101.6 mm) ± .01 in.
Weight 1.32 lb. (0.60 kg) ± 10%

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