Western Digital Red 4TB 3.5" Internal Hard Drive - WD40EFRX

  • 4TB
  • HDD
  • 3.5"
$179
+

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WD Red 4 TB Hard Drive for NAS ( WD40EFRX)


Product Specifications
Interface SATA 6 Gb/s
Performance Specifications
Rotational Speed IntelliPower *
Buffer Size 64 MB
Transfer Rates
Buffer To Host (Serial ATA) 6 Gb/s (Max)
Physical Specifications
Formatted Capacity 4,000,787 MB
Capacity 4 TB
Form Factor 3.5 Inch
User Sectors Per Drive 7,814,037,168
Performance Specifications
Target Performance
MTBF 1,000,000 hours
Physical Dimensions
English
Height 1.028 Inches
Depth 5.787 Inches
Width 4.00 Inches
Weight 1.50 Pounds
Metric
Height 26.1 mm
Depth 147 mm
Width 101.6 mm
Weight 0.68 kg
Environmental Specifications
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 250G, 2 ms
Acoustics
Idle Mode 25 dBA (average)
Seek Mode 0 28 dBA (average)
Temperature (English)
Operating 32° F to 158° F
Non-operating -40° F to 158° F
Temperature (Metric)
Operating -0° C to 70° C
Non-operating -40° C to 70° C
Humidity
Operating 5-95% RH non-condensing
Vibration
Operating 0.004 g²/Hz (10 to 300 Hz)
Non-operating 0.05 g²/Hz (10 to 300 Hz)
Operating
Linear 20-300 Hz, 0.75G (0 to peak)
Electrical Specifications
Current Requirements
12 VDC
Read/Write 250 mA
Idle 230 mA
Standby 7 mA
Sleep 7 mA
5 VDC
Read/Write 280 mA
Idle 260 mA
Standby 105 mA
Sleep 105 mA
Power Dissipation
Read/Write 4.50 Watts
Idle 3.30 Watts
Standby 0.40 Watts
Sleep 0.40 Watts
Compatibility
Operating System
Compatibility Windows/Mac/Linux
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.
Quick Specifications
Manufacturer Specifications

WD Red 4 TB Hard Drive for NAS ( WD40EFRX)

Drive Specification Sheet (PDF)


Product Specifications
Interface SATA 6 Gb/s


Performance Specifications
Rotational Speed IntelliPower *
Buffer Size 64 MB

Transfer Rates
Buffer To Host (Serial ATA) 6 Gb/s (Max)


Physical Specifications
Formatted Capacity 4,000,787 MB
Capacity 4 TB
Form Factor 3.5 Inch
User Sectors Per Drive 7,814,037,168


Performance Specifications
Target Performance
MTBF 1,000,000 hours


Physical Dimensions
English
Height 1.028 Inches
Depth 5.787 Inches
Width 4.00 Inches
Weight 1.50 Pounds

Metric
Height 26.1 mm
Depth 147 mm
Width 101.6 mm
Weight 0.68 kg


Environmental Specifications
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 250G, 2 ms

Acoustics
Idle Mode 25 dBA (average)
Seek Mode 0 28 dBA (average)

Temperature (English)
Operating 32° F to 158° F
Non-operating -40° F to 158° F

Temperature (Metric)
Operating -0° C to 70° C
Non-operating -40° C to 70° C

Humidity
Operating 5-95% RH non-condensing

Vibration
Operating 0.004 g²/Hz (10 to 300 Hz)
Non-operating 0.05 g²/Hz (10 to 300 Hz)

Operating
Linear 20-300 Hz, 0.75G (0 to peak)


Electrical Specifications
Current Requirements
12 VDC
Read/Write 250 mA
Idle 230 mA
Standby 7 mA
Sleep 7 mA

5 VDC
Read/Write 280 mA
Idle 260 mA
Standby 105 mA
Sleep 105 mA

Power Dissipation
Read/Write 4.50 Watts
Idle 3.30 Watts
Standby 0.40 Watts
Sleep 0.40 Watts


Compatibility
Operating System
Compatibility Windows/Mac/Linux

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.