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WD Caviar Blue WD6400AAKS 640GB SATA

WD Caviar Blue SATA Hard Drives 640 GB, SATA 3 Gb/s, 16 MB Cache, 7200 RPM

Performance Specifications
Transfer Rates
    Buffer To Host (Serial ATA)    3 Gb/s (Max)
Physical Specifications
    Formatted Capacity    640,135 MB
    Capacity    640 GB
    Interface    SATA 3 Gb/s
    User Sectors Per Drive    1,250,263,728
Physical Dimensions
English
    Height    1.028 Inches
    Length    5.787 Inches
    Width    4.00 Inches
    Weight    1.39 Pounds
Metric
    Height    25.4 mm
    Length    147 mm
    Width    101.6 mm
    Weight    0.63 kg
Environmental Specifications
Shock
    Operating Shock (Read)    30G, 2 ms
    Non-operating Shock    300G, 2 ms
Acoustics
    Idle Mode    25 dBA (average)
    Seek Mode 0    29 dBA (average)
    Seek Mode 3    26 dBA (average)
Temperature (English)
    Operating    41° F to 140° F
    Non-operating    -40° F to 158° F
Temperature (Metric)
    Operating    5° C to 60° C
    Non-operating    -40° C to 70° C
Humidity
    Operating    5-95% RH non-condensing
    Non-operating    5-95% RH non-condensing
Altitude (English)
    Operating    -1,000 feet to 10,000 feet
    Non-operating    -1,000 feet to 40,000 feet
Altitude (Metric)
    Operating    -305M to 3,050M
    Non-operating    -305M to 12,200M
Vibration
    Operating
    Linear    20-300 Hz, 0.75 G (0 to peak)
    Random    0.004 g²/Hz (10 to 300 Hz)
    Non-operating
    Low Frequency    10-300 Hz, 0.195 inches (double amplitude)
    High Frequency    20-500 Hz, 4.0G (0 to peak)
Electrical Specifications
Current Requirements
    12 VDC
    Read/Write    410 mA
    Idle    390 mA
    Standby    6 mA
    Sleep    6 mA
    5 VDC
    Read/Write    675 mA
    Idle    600 mA
    Standby    180 mA
    Sleep    180 mA
    Power Dissipation
    Read/Write    8.30 Watts
    Idle    7.70 Watts
    Standby    1.00 Watts
    Sleep    1.00 Watts
As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, megabit per second (Mb/s) = one million bits per second, and gigabit per second (Gb/s) = one billion bits per second.

Performance and reliability for everyday computing. With SATA and PATA interfaces and cache sizes up to 32 MB, this series of drives offer a full range of performance features. Pick the drive that suits your needs with the confidence in knowing that all WD Caviar Blue drives are built to the highest standards of quality and reliability.