There’s a leading edge WD Red drive for every compatible NAS system to help fulfill
your data storage needs. With drives up to 10TB, WD Red drives offer a wide array of
solutions for customers looking to build a NAS storage solution. Built for single-bay to
8-bay NAS systems, WD Red drives pack the power to store your precious data in one
powerhouse unit. With WD Red drives, you’re ready for what’s next.
Exclusive NASware™ 3.0
Not just any drive will do. In single-bay to 8-bay NAS systems, WD Red drives raise the
bar. Get as much as 80TB capacity, and with WD’s exclusive NASware™ technology, you
can optimize every single one of them. Built into every WD Red hard drive, NASware
3.0’s advanced technology improves your system’s storage performance by increasing
compatibility, integration, upgradeability, and reliability.
Built for optimum NAS compatibility
Desktop drives aren’t purpose-built for NAS. But WD Red drives with NASware
technology are. Our exclusive technology takes the guesswork out of selecting a
drive. WD Red drives are for small NAS systems, and our unique algorithm balances
performance and reliability in NAS and RAID environments. Simply put, a WD Red drive is
one of the most compatible drives available for NAS enclosures. But don’t take our word
for it. WD Red drives are a reflection of extensive NAS partner technology engagement
and compatibility-testing resulting in a leading compatibility list for NAS systems.
Desktop Drives vs. WD Red
In a Network Attached Storage device, a desktop hard drive is not typically designed for
NAS environments. Do right by your NAS and choose the drive designed for NAS with an
array of features to help preserve your data and maintain optimum performance. Take
the following into consideration when choosing a hard drive for your NAS:
• Compatibility: Without being tested for compatibility with your NAS system,
optimum performance is not guaranteed.
• Reliability: The always-on environment of a NAS or RAID is a challenging one. And
desktop drives aren’t typically designed and tested under those conditions. WD
Red drives are.
• Error recovery controls: WD Red NAS hard drives are specifically designed with
RAID error recovery control to help reduce failures within the NAS system. Desktop
drives are not typically designed for RAID environments.
• Noise and Vibration Protection: Designed to operate solo, desktop drives typically
offer little or no protection from the noise and vibration present in a multi-drive
system. WD Red drives are designed for multi-bay NAS systems.
WD Red for Home
Stream, backup, share, and organize your digital content at home with a NAS and
WD Red drives designed to effortlessly share content with the devices in your home.
NASware 3.0 technology increases your drives’ compatibility with your devices, TV,
stereo, and more. Live in a connected world.
WD Red for Small Business
Businesses thrive on productivity and efficiency—two of the guiding principles built
into the design of WD Red drives. It’s the hard drive of choice for 1 to 8 bay systems.
NASware 3.0 technology allows for seamless integration with your existing network
so WD Red can share and backup files at the speed of your business. And for larger
businesses with up to 24-bays, count on WD Red Pro™ drives.
WD Red Pro for Big Business
If you’re looking for maximum performance in a heavy use NAS, WD Red Pro drives
deliver the same exceptional performance for the business customer. For NAS
environments with 8 to 24 bays, WD Red Pro drives are designed to handle an increase in
workload and comes with a 5-year limited warranty.
DATA SHEET NAS HARD DRIVES
WD Red™
INTERFACE
SATA 6 Gb/s
FORM FACTOR
3.5 and 2.5-inch
CAPACITIES
3.5-inch: 1TB to 10TB
2.5-inch: 1TB
MODEL NUMBERS
3.5-inch:
WD100EFAX
WD80EFAX
WD80EFZX
WD60EFRX
WD40EFRX
WD30EFRX
WD20EFRX
WD10EFRX
2.5-inch:
WD10JFCX
THE WESTERN DIGITAL ADVANTAGE
Western Digital puts our products through extensive
Functional Integrity Testing (F.I.T.) prior to any
product launch. This testing ensures our products
consistently meet the quality and reliability standards
of the Western Digital brand. WD also has a detailed
Knowledge Base with more than 1,000 helpful articles
as well as helpful software and utilities. Our toll-free
customer support lines are here to help or you can
access our WD Support site for additional details.
Highlights
• Specifically designed for use in NAS systems with
up to 8 bays
• Supports up to 180 TB/yr workload rate*
• NASware technology for compatibility
• 3-year limited warranty
• Small and home office NAS systems in a 24×7
environment
Specifications
DATA SHEET NAS HARD DRIVES
WD Red™
Specifications subject to change without notice.
1 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.
WD hard drive products manufactured and sold worldwide after June 8, 2011, meet or exceed Restriction of Hazard-
ous 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 annual-
ized (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.
10TB 8TB 8TB 6TB 4TB
Model Number¹ WD100EFAX WD80EFAX WD80EFZX WD60EFRX WD40EFRX
Interface SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s
Formatted capacity 10TB 8TB 8TB 6TB 4TB
Form factor 3.5-inch 3.5-inch 3.5-inch 3.5-inch 3.5-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 (read
speed) up to
210 MB/s 210 MB/s 178 MB/s 175 MB/s 150 MB/s
Cache (MB) 256 256 128 64 64
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 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) 33333
Power Management8
12VDC ±10% (A, peak)
5VDC ±10% (A, peak)
Average power requirements (W)
Read/Write
Idle
Standby and Sleep
1.79
5.7
2.8
0.5
1.85
8.8
5.3
0.8
1.79
6.4
5.2
0.7
1.75
5.3
3.4
0.4
1.75
4.5
3.3
0.4
Environmental Specifications⁹
Temperature (°C)
Operating
Non-operating
0 to 65
-40 to 70
0 to 65
-40 to 70
0 to 60
-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
30
65
250
Acoustics (dBA)10
Idle
Seek (average)
25
29
27
29
20
29
25
29
25
28
Physical Dimensions
Height (in./mm, max) 1.028/26.1 1.028/26.1 1.028/26.1 1.028/26.1 1.028/26.1
Length (in./mm, max) 5.787/147 5.787/147 5.787/147 5.787/147 5.787/147
Width (in./mm, ± .01 in.) 4/101.6 4/101.6 4/101.6 4/101.6 4/101.6
Weight (lb/kg , ± 10%) 1.43/0.65 1.58/0.715 1.43/0.65 1.65/0.75 1.50/0.68
November 2018 2879–800002-A11
© 2018 Western Digital Corporation or its affiliates. All rights reserved. Produced 4/18. Rev. 7/18. Western
Digital, the Western Digital Logo, NASware and WD Red are 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. Product specifications subject to change
without notice.
5601 Great Oaks Parkway
San Jose, CA 95119, USA
US (Toll-Free): 800.801.4618
International: 408.717.6000
www.westerndigital.com
Specifications
DATA SHEET NAS HARD DRIVES
WD Red™
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.
WD hard drive products manufactured and sold worldwide after June 8, 2011, meet or exceed Restriction of Hazard-
ous 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 annual-
ized (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.
3TB 2TB 1TB 1TB
Model Number¹ WD30EFRX WD20EFRX WD10EFRX WD10JFCX
Interface SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s
Formatted capacity 3TB 2TB 1TB 1TB
Form factor 3.5-inch 3.5-inch 3.5-inch 2.5-inch
Native command queuing Yes Yes Yes Yes
Advanced Format (AF) Yes Yes Yes Yes
RoHS compliant Yes Yes Yes Yes
Performance
Interface Transfer Rate (read
speed) up to
147 MB/s 147 MB/s 150 MB/s 144 MB/s
Cache (MB) 64 64 64 16
Performance 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
Non-recoverable read errors per
bits read
<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
Workload Rate (TB/year) 180 180 180 180
Limited warranty (years) 3 3 3 3
Power Management8
12VDC ±10% (A, peak)
5VDC ±10% (A, peak)
Average power requirements (W)
Read/Write
Idle
Standby and Sleep
1.73
4.1
2.7
0.4
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 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
400
1000
Acoustics (dBA)10
Idle
Seek (average)
23
24
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
Length (in./mm, max) 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 2.75/69.85
Weight (lb/kg , ± 10%) 1.40/0.64 1.32/0.60 0.99/0.45 0.25/0.115
CAN ICES-3 (B) / NMB-3 (B)
