
WD Red™ Pro
PRODUCT BRIEF
Product Highlights
• Available in large capacities with support for 1–24
bays
• 5-year limited warranty
• Enhanced reliability with 3D Active BalanceTM
Plus technology and error recovery controls with
NASware 3.0 technology
• Extended drive testing to ensure each drive is
tested for extended reliable operation
• Vibration & Shock protection
INTERFACE
SATA 6 Gb/s
FORM FACTOR
3.5-inch
PERFORMANCE CLASS
7200 RPM Class
CAPACITIES
2TB to 14TB
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 Suppor t site for
additional details.
MODELS
WD141KFGX
WD121KFBX
WD102KFBX
WD101KFBX
WD8003FFBX
WD6003FFBX
WD4003FFBX
WD2002FFSX
NAS HARD DRIVES
Designed specifically with SMB customers in mind, WD Red Pro drives are available for up to 24 bay medium to large-scale 24×7 NAS environments. Engineered
to handle increased workloads from your business, WD Red Pro drives are
extensively tested and carry a long 5-year limited warranty.
NAS for Big Business
Increase the efficiency and productivity of your business with WD Red Pro hard drives
for up to 24 bay NAS systems. WD Red Pro comes equipped with NASware™ 3.0, which
increases system compatibility allowing for seamless integration with your existing network infrastructure. Add value to your business by enabling your employees to quickly
share their files and back up folders reliably with WD Red Pro NAS hard drives in your NAS
solution.
Exclusive NASware 3.0 technology
Our exclusive advanced firmware technology, NASware 3.0 enables seamless integration,
robust data protection and optimal performance for NAS systems operating under heavy
demand.
Built for optimum NAS compatibility
Desktop drives aren’t purpose-built for NAS. But WD Red Pro drives with NASware 3.0
technology are purpose-built for NAS. Our exclusive technology takes the guesswork out
of selecting a drive and balances performance and reliability in NAS and RAID environments. Simply put, a WD Red Pro drive is one of the most compatible drives available for
medium to large NAS enclosures. But don’t take our word for it. WD Red Pro drives are a
reflection of an extensive NAS partner technology engagement and compatibility-testing resulting in a leading compatibility list for NAS systems.
Larger NAS Bay Shock Protection
In a Network Attached Storage device, a desktop hard drive is not typically designed for
NAS environments. WD Red Pro drives are equipped with a multi-axis shock sensor that
automatically detects subtle shock events and dynamic fly height technology which adjusts each read-write function to compensate and protect the data. This combination of
technology further protects the drives in larger 1 to 24 bay NAS environments and helps
increase hard drive reliability.

WD Red™ Pro
PRODUCT BRIEF
NAS HARD DRIVES
Specifications
14TB 12TB 10TB 10TB 8TB
Model Number¹
Recording Technology
Interface SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s
Formatted capacity 14TB 12TB 10TB 10TB 8TB
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) Ye s Yes Yes Yes Yes
RoHS compliant Yes Yes Yes Yes Yes
11
Performance
Interface Transfer Rate (max)
Interface Speed
Interface Transfer Rate (ma x)
Internal Transfer Rate
Cache (MB) 512 256 256 256 256
Performance Class 7200 RPM Class 7200 RPM Class 7200 RPM Class 7200 RPM Class 7200 RPM Class
Reliability/Data Integrity
Load/unload cycles 600,000 600,000 600,000 600,000 600,000
Non-recoverable errors per bits
read
MTBF (hours) 1,000,000 1,000,000 1,000,000 1,000,000 1,000,000
Workload Rate (TB/year) 300 300 300 300 300
Limited warranty (years) 5 5 5 5 5
Power Management
12VDC ±5% (A, peak)
5VDC ±5% (A, peak)
Average power requirements (W)
Read/Write
Idle
Standby and Slee p
8
Environmental Specifications⁹
Temperature (°C)
Operating
Non-operating
Sho ck (Gs)
Operating, (2 ms, read/write)
Operating, (2 ms, read)
Non-operating (2 ms)
Acoustics (dBA)10
Idle
Seek (average)
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%) 1.52/0.69 1.46/0.6 6 1 .6 5/0. 75 1.43/0 .6 5 1.58/0.72
WD141KFGX WD121KFBX WD102KFBX WD101KFBX WD8003FFBX
CMR CMR CMR CMR CMR
6 G b/s 6 G b/s 6 G b/s 6 G b/s 6 G b/s
25 5 M B/s 24 0 M B/s 265 M B/s 2 40 M B/s 2 35 M B/s
<10 in 1014
1.85
6.2
3.0
0.8
0 to 65
-40 to 70
30
65
300
20
36
<10 in 1014
1.8
6.0
2.8
0.6
0 to 65
-40 to 70
30
65
300
20
36
<10 in 1014
1.75
8.4
4.6
0.5
0 to 65
-40 to 70
30
65
250
34
38
<10 in 1014
1.8
5.7
2.8
0.5
0 to 65
-40 to 70
30
65
300
20
36
<10 in 1014
2.08
8.8
4.6
0.7
0 to 65
-40 to 70
30
65
300
29
36

WD Red™ Pro
PRODUCT BRIEF
Specifications
6TB 4TB 2TB
Model Number¹
Recording Technology CMR CMR CMR
Interface SATA 6 Gb/s SATA 6 Gb/s SATA 6 Gb/s
Formatted capacity 6TB 4TB 2TB
Form factor 3.5-inch 3.5-inch 3.5-inch
Native command queuing Ye s Yes Yes
Advanced Format (AF) Yes Yes Yes
RoHS compliant Yes Yes Yes
Performance
Interface Transfer Rate (max)
Interface Speed
Interface Transfer Rate (ma x)
Internal Transfer Rate
Cache (MB) 256 256 64
Performance Class 7200 RPM Class 7200 RPM Class 7200 RPM Class
Reliability/Data Integrity
Load/unload cycles 600,000 600,000 600,000
Non-recoverable errors per bits
read
MTBF (hours) 1,000,000 1,000,000 1,000,000
Workload Rate (TB/year) 300 300 300
Limited warranty (years) 5 5 5
Power Management8
12VDC ±5% (A, peak)
5VDC ±5% (A, peak)
Average power requirements (W)
Read/Write
Idle
Standby and Slee p
Environmental Specifications⁹
Temperature (°C)
Operating
Non-operating
Sho ck (Gs)
Operating, (2 ms, read/write)
Operating, (2 ms, read)
Non-operating (2 ms)
Acoustics (dBA)10
Idle
Seek (average)
Physical Dimensions
Height (in./mm, max) 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
Width (in./mm, ± .01 in.) 4/101.6 4/101.6 4/101.6
Weight (lb/kg , ± 10%) 1.58/0.72 1.58/0.72 1.58/0.72
Specific ations subjec t to change withou t notice.
1
Not all pro ducts may be avail able in all region s of the world
As used for s torage capaci ty, one megabyte (MB) = o ne million bytes, o ne gigabyte (GB) = one b illion bytes, an d
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 (M B/s) = one million by tes per second, an d gigabit per seco nd (Gb/s) = one billio n bits per second . Effective
maximu m SATA 6 Gb/s transfe r rate calculated a ccording to the Ser ial ATA specificati on published by th e SATA-IO
organiz ation as of the date o f this spec ification sheet . Visit www.sat a-io.org for detail s.
WD hard dri ve products manu factured and so ld worldwide af ter June 8, 2011, meet o r exceed Res triction of
Hazardous Substances (RoHS) compliance requirements as mandated by the RoHS Directive 2011/65/EU.
Control led unload at ambi ent condition.
WD6003FFBX WD4003FFBX WD2002FFSX
6 G b/s 6 Gb/s 6 G b/s
238 MB/s 217 MB /s 16 4 MB/s
<10 in 1014
1.79
7.2
3.7
0.4
0 to 65
-40 to 70
30
65
300
29
36
<10 in 1014 <10 in 1014
1.79
7.2
3.7
0.4
0 to 65
-40 to 70
30
65
300
29
36
MTBF spe cifications are ba sed upon interna l testing using a 40 °C base castin g temperature. MTB F is based on
a sample population and is estimated by statistical measurements and acceleration algorithms. MTBF does not
predic t an individual dr ive’s reliabilit y and does not cons titute a wa rranty.
Workloa d Rate is defined as the a mount of user data t ransferred to or f rom the hard drive. Wor kload Rate is
annual ized (TB transfe rred X (8760 / record ed power-on hours)). Worklo ad Rate will vary d ependi ng on your
hardware and software components and configurations.
See http://support.wd.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 pow er level.
1.9
7.8
6.0
1.4
0 to 65
-40 to 70
30
65
300
29
31
NAS HARD DRIVES
5601 Great Oaks Parkway
San Jose, CA 95119, USA
www.westerndigital.com
© 2020 Western D igital Corporatio n or its affiliates. All r ights re served. Wester n Digit al, the Wes tern Digital Lo go,
NASware an d WD Red are re gistered trad emarks or trademar ks of Western Digital Cor porat ion or it s affil iates in t he
U.S. and/or other count ries. All other m arks are the prop ert y of their respe ctive owners. Pictures shown may v ary
from actual products. Product specifications subject to change without notice.
2579–810239-A02 May 2020