Western Digital Caviar SE SATA Hard Drive WD400JD

Western Digital Part #/MPN: WD400JD

DiscTech Item #: WDC-WD400JD-RF-OE-DEL


Capacity: 40GB

Speed: 7,200RPM

Interface Types: SATA

Form Factor: 3.5inx1.0in LFF Hard Drive

Sector Size: 512 / 512e

Sustained Throughput: 150

Average Seek Time: 10.1

Electrical Interface: SATA 150 - 1.50Gbps

On-Board Cache: 8MB

Western Digital WD400JD Caviar SE 40GB 7.2K 3.5" SATA Hard Drive - Refurbished OEM

Cool-running, superior performance, and industry-leading reliability make
these drives the perfect hard drives for desktop, business, and consumer
electronics storage — ideal for high-performance family computing such
as photo editing, multimedia functions, and business applications such as
spreadsheets and databases.

Product Benefits
Fast — WD, the first to introduce an 8 MB buffer, has advanced the caching
algorithms of this new and improved family of hard drives, resulting in next-generation
high performance.

Cool — Heat is a major contributor to hard drive wear, and cool drive operating
temperatures help increase long-term drive reliability. WD achieves the lowest
operating temperature of any hard drive in its class by lowering the drive’s power
consumption through advanced design of electronics and firmware.

Data Lifeguard Tools™ — This software utility works with embedded
Data Lifeguard™
 features (including shock protection, an environmental protection
system, and error detection and repair) to make hard drive installation, management,
and diagnostics simple and worry-free.

Alternate PN: U3975 0U3975


This hard drive is compatible with any computer that accepts 3.5" SATA hard drives.

Model number WD400JD
Model Name Caviar SE
Formatted Capacity 40 Gbytes
Rotational Speed 7,200 rpm
Default Buffer (cache) Size 8 Mbytes
Interface transfer rate (max. MB/sec)300
Average Seek Time 8.9 msec typical
Average Latency 4.2 msec
Form Factor(width) 3.5-inch
Form Factor(height) 1-inch
Height 17.6 mm
Width 101.6 mm
Length 147 mm
Weight 1.12 lbs
Max Operating Shock (2-msec) 63 Gs
Max Nonoperating Shock (2-msec) 350 Gs
Operating Temperature (min) 0 deg C
Nonoperating Temperature (max) 60 deg C
Acoustics, Idle (sound power, typ) 2.7 Bels

Click here to view the manufacturer's item description/brochure

Alternate MPNs: U3975 0U3975

Weight: 1.8 lb

Warranty: 1 Year DiscTech


Condition Levels Explained

These products have had NO problems or failures, they merely have some usage. The product has been professionally returned to excellent condition. These items have been fully tested, formatted (if appropriate) &repackaged. Hard drives are fully vetted for surface defects and wear, only healthy disks are approved for resale to our customers. Please see our refurbishing process for more details. Watch a video about our refurbishing process

1 Year DiscTech Warranty

Product Warranties Explained

The product has a DiscTech warranty for the time period specified. View our limited warranty