User Manual

Specifications subject to change without notice.
 Not all products may be available in all regions of the world
 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. Performance will vary
depending on your hardware and softwre components and configurations.
 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.
 Controlled unload at ambient condition.
 MTBF specifications are based upon internal testing using a 40°C base casting temperature. MTBF is based on
a sample population and is estimated by statistical measurements and acceleration algorithms. MTBF does not
predict an individual drive’s reliability and does not constitute a warranty.
 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.
 See support.wdc.com/warranty for regionally specific warranty details.
 Power measurements at room-ambient temperature.
 No non-recoverable errors during operating tests or after non-operating tests.
10
Sound power level.
12
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.
13
Implementation of SMR for these products is device-managed SMR.
3TB 2TB 2TB 1TB 1TB
Model Number¹
WD30EFRX WD20EFAX WD20EFRX WD10EFRX WD10JFCX
Recording Technology
13
CMR SMR CMR CMR CMR
Interface SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s
Formatted capacity 3TB 2TB 2TB 1TB 1TB
Form factor 3.5-inch 3.5-inch 3.5-inch 3.5-inch 2.5-inch
Native command queuing Yes Yes Yes Yes Yes
Advanced Format (AF) Yes Yes Yes Yes Yes
RoHS compliant Yes Yes Yes Yes Yes
Performance
Interface Transfer Rate up to 147 MB/s 180 MB/s 147 MB/s 150 MB/s 144 MB/s
Cache (MB) 64 256 64 64 16
Performance Class 5400 RPM Class 5400 RPM Class 5400 RPM Class 5400 RPM Class 5400 RPM Class
Reliability/Data Integrity
Load/unload cycles 600,000 600,000 600,000 600,000 600,000
Non-recoverable read errors per
bits read <1 in 1014 <1 in 1014 <1 in 1014 <1 in 1014 <1 in 1014
MTBF (hours) 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000
Workload Rate (TB/year) 180 180 180 180 180
Limited warranty (years) 3 3 3 3 3
Power Management
8
12VDC ±5% (A, peak)
5VDC ±5% (A, peak)
Average power requirements (W)
Read/Write
Idle
Standby and Sleep
1.73
4.1
2.7
0.4
1.31
4.1
2.3
0.6
1.73
4.1
2.7
0.4
1.20
3.3
2.3
0.4
1.00
1.4
0.6
0.2
Environmental Specifications⁹
Temperature (°C)
Operating
Non-operating
0 to 65
-40 to 70
0 to 65
-40 to 70
0 to 65
-40 to 70
0 to 60
-40 to 70
0 to 60
-40 to 70
Shock (Gs)
Operating, (2 ms, read/write)
Operating, (2 ms, read)
Non-operating (2 ms)
30
65
250
30
65
250
30
65
250
30
65
250
400
1000
Acoustics (dBA)
10
Idle
Seek (average)
23
24
21
26
23
24
21
22
24
25
Physical Dimensions
Height (in./mm, max) 1.028/26.1 1.028/26.1 1.028/26.1 1.028/26.1 0.374/9.50
Length (in./mm, max) 5.787/147 5.787/147 5.787/147 5.787/147 3.94/100.2
Width (in./mm, ± .01 in.) 4/101.6 4/101.6 4/101.6 4/101.6 2.75/69.85
Weight (lb/kg , ± 10%) 1.40/0.64 1.32/0.60 0.99/0.45 0.99/0.45 0.25/0.115
Specifications
PRODUCT BRIEF
NAS HARD DRIVES
WD Red
™
2579–810238-A02 May 2020
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registered trademarks or trademarks of Western Digital Corporation or its affiliates in the U.S. and/or other countries. All other marks
are the property of their respective owners. Pictures shown may vary from actual products. References in this publication to Western
Digital products, programs, or services do not imply that they will be made available in all countries. Product specifications provided are
sample specifications that are subject to change and do not constitute a warranty. Please visit our website,
http://www.westerndigital.com for additional information on product specifications.
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