WD Red Plus 4TB NAS 64MB 3.5' 5400RPM SATA3 6Gb/s 64MB Cache

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
User Sectors Per Drive 7,814,037,168

Performance Specifications
Target Performance
MTBF 1,000,000 hours

Physical Dimensions
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 (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