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4TB Red WD40EFRX, 5400 RPM, SATA 6Gb/s, 64MB cache, 3.5-Inch HDD

SKU: 7990926

Manufacturer: WESTERN DIGITAL

MPN: WD40EFRX

Availability: Available


Price: $125.49
or as low as $4/month
Quantity:
Specifications
Model number1 WD40EFRX
Interface SATA 6 Gb/s
Formatted capacity2 4TB
Form factor 3.5-inch
Advanced Format (AF) Yes
Native command queuing Yes
RoHS compliant3 Yes
Performance
Interface transfer rate (max)
Interface speed
Internal transfer rate

6 Gb/s
150 MB/s
Cache (MB) 64
Performance Class 5400 RPM Class
Reliability/Data Integrity
Load/unload cycles4 600,000
Non-recoverable read errors per  bits read <10 in 1014
MTBF (hours)5 1,000,000
Workload Rate (TB/yr) 10 180
Limited warranty (years)6 3
Power Management
12VDC-/+10% (A, peak) 1,75
Average power requirements (W) 
Read/Write
Idle
Standby/Sleep

4.5
3.3 
0.4
Environmental Specifications7
Temperature (°C) 
Operating8
Non-operating

0 to 65 
-40 to 70
Shock  (Gs)
Operating (2 ms, read/write)
Operating (2 ms, read)
Non-operating (2 ms)

30
65
250
Acoustics (dBA)9
Idle
Seek  (average)

25
28
Physical Dimensions
Height (in./mm, max) 1.028/26.1
Length (in./mm, max) 5.787/147
Width (in./mm, ± .01 in.) 4/101.6
Weight (lb/kg, ± 10%) 1.50/0.68
1 Not all products may be available in all regions of the world.
2 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, and gigabit per second (Gb/s) = one billion bits per second. Effective maximum SATA 6 Gb/s transfer rate calculated according to the Serial ATA specification published by the SATA-IO organization as of the date of this specification sheet. Visit www. sata-io.org for details.
3 WD hard drive products manufactured and sold worldwide after June 8, 2011, meet or exceed Restriction of Hazardous Substances (RoHS) compliance requirements as mandated by the RoHS Directive 2011/65/EU.
4 Controlled unload at ambient condition.
5 Based on a typical NAS product environment under normal operating conditions.
6 The term of the limited warranty may vary by region. Visit http://support.wd.com/warranty for details.
7 No non-recoverable errors during operating tests or after non-operating tests.
8 On the base casting.
9 Sound power level.
10 Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred X (8760 / recorded power-on hours)). Workload Rate will vary depending on your hardware and software components and configurations.