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Western Digital WD4000AAJS 400GB SATA Hard Drive

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Western Digital WD4000AAJS 400GB 3.5in 3Gbps 7.2K RPM Caviar SE SATA HDD – Factory Refurbished

Western Digital WD4000AAJS 400GB 3.5″ 3.0 Gbps 7200 RPM Caviar SE Serial ATA Hard Disk Drive – Refurbished

WD CaviarĀ® SE
Desktop Hard Drives

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

Product Benefits

Fast ā€”Ā 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 ā€”Ā 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 driveā€™s power consumption through advanced design of electronics and firmware.

Data Lifeguard Toolsā„¢ ā€”Ā This software utility works with embedded Data Lifeguardā„¢ 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.

SKU: WD4000AAJS Category: Tags: ,
Weight 0.60 kg
SPECIFICATIONS
Model Number WD4000AAJS
Capacity 400GB
Formatted Capacity 400,088 MB
Used Sectors Per Drive 781,422,768
Interface 300 MB/s Serial ATA 2.0 (backwards compatible with Serial ATA 1.0)
Bytes Per Sector 512
Dedicated Landing Zone Yes
Actuator Latch/Auto Park Yes
Data Transfer Rate (maximum)
– Buffer to Host		 300 MB/s max
Average Read Seek 8.9 ms (average)
Track-to-track Seek 2.0 ms (average)
Full Stroke Read Seek 21 ms (average)
Average Latency 4.2 ms
Rotational Speed 7200 RPM
Read Cache Adaptive
Write Cache Yes
Buffer 8 MB
Drive Ready Time 9.0 sec average
Start/Stop Cycles 50,000 min
Error Rate (non-recoverable) <1 in 10e14 bits read
LBA support Yes
Height 1.028 in (25.4 mm) max)
Length 5.787 in (147.0 mm) max
Width 4.0 in (101.6 mm) Ā± .01 in.
Weight 1.32 lb (0.60 kg) Ā± 10%
Read/Write
– 12 V (Ā± 10%)
– 5V(Ā± 5%)
– Power		 450 mA
800 mA
9.50 W
Idle
– 12 V (Ā± 10%)
– 5V(Ā± 5%)
– Power		 430 mA
730 mA
8.75 W
Standby
– 12 V (Ā± 10%)
– 5V(Ā± 5%)
– Power		 20 mA
270 mA
1.60 W
Sleep
– 12 V (Ā± 10%)
– 5V(Ā± 5%)
– Power		 20 mA
250 mA
1.50 W
Shock
– Operating (2ms)
– Non-operating (2ms)
– Half sine wave measured in 2 ms		 65G
250G
duration, measured withough isolation
Vibration
Operating
– Random
– Linear
Non-operating
– Linear

0.004 g2 / Hz (10 to 300 Hz)
20-300 Hz, 0.75G (0 to peak)

5-20 Hz, 0.195 inches (dbl amp)
20-500 Hz, 4G (0 to peak)
Operating Temperature and Humidity
– Temperature
– Humidity
– Thermal Gradient		 5Ā°C to 55Ā°C (41Ā°F to 131Ā°F)
5-95% RH non-condensing
20Ā°C/hour (maximum)
Non-Operating Temperature and Humidity
– Temperature
– Humidity
– Thermal Gradient		 -40Ā°C to 65Ā°C (-40Ā°F to 149Ā°F)
5-95% RH non-condensing
30Ā°C/hour (maximum)
Acoustics (average)
– Idle Mode
– Seek Mode 0
– Seek Mode 3		 26 dBA
31 dBA
27 dBA

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