Specification Sheet
WD Red
™
NAS Storage 
Storage for 1 to 8 bay NAS solutions
WD Red is designed specifically for NAS systems 
that have 1 to 8 drive bays in both 3.5-inch and 
2.5-inch form factors. The drives are designed 
and extensively tested for compatibility in the 
unique 24×7 operating environment and for the 
demanding system requirements of home and 
small office NAS.
INTERFACE
SATA 6 Gb/s
FORM FACTORS
3.5-inch 
2.5-inch
PERFORMANCE CLASS
5400 RPM Class
CAPACITIES
3.5-inch: 1TB to 10TB
2.5-inch: 750GB and 1TB
MODEL NUMBERS
3.5-inch 2.5-inch
WD100EFAX 
WD80EFZX 
WD60EFRX 
WD40EFRX
WD30EFRX 
WD20EFRX
WD10EFRX
WD10JFCX
WD7500BFCX
Product Features
Fill your NAS with WD Red, then 
ll it with awesome. 
There’s an industry-leading WD 
Red drive for every compatible 
NAS system to help fulfill your 
data storage needs. With drives 
up to 10TB, WD Red offers a wide 
array of solutions for customers 
looking to build the biggest, best-
performing NAS storage solution. 
Built for single-bay to 8-bay NAS 
systems, WD Red packs the power 
to store your precious data in one 
powerhouse unit. With WD Red, 
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 
raises the bar. Get as much as 80TB 
capacity, and with WD’s exclusive 
NASware 3.0, 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 
Our exclusive advanced firmware 
Desktop drives aren’t purpose-
built for NAS. But WD Red drives 
with NASware are. Our exclusive 
technology takes the guesswork 
out of selecting a drive. WD Red 
is for small NAS systems, and 
our unique algorithm balances 
performance and reliability in 
NAS and RAID environments. 
Simply put, WD Red is the most 
compatible drive available for NAS 
enclosures. But don’t take our 
word for it. WD Red is a reflection 
of the most extensive NAS partner 
compatibility-testing list that is 
available on the market.*
*Compatibility list as of March 
2016
Desktop drives vs. WD Red 
In a Network Attached Storage 
device, a desktop hard drive is not 
designed for NAS environments. 
Do right by your NAS and choose 
the drive with an array of features 
to 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 
hot one. And desktop drives aren’t 
typically designed and tested in 
those conditions. WD Red is.
• 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 typically not designed 
for RAID environments where this 
can be an issue. 
• Noise and Vibration Protection: 
Designed to operate solo, desktop 
drives offer little or no protection 
from the noise and vibration faced 
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 to 
the devices in your home. Red 
NASware 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. It’s the hard drive of 
choice for 1 to 8 bay systems. 
NASware 3.0 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 16 bays, count on WD 
Red Pro. 
WD Red Pro for Big Business
If you’re looking for maximum 
performance in a heavy use NAS, 
WD Red Pro delivers the same 
exceptional performance for 
the business customer. For NAS 
environments with 8 to 16 bays, 
WD Red Pro is designed to handle 
an increase in workload and comes 
with a 5-year limited warranty.
Applications
WD Red NAS hard drives are recommended for use in home and small office 1–8 bay NAS systems. For systems that use more than 8 bays, please 
consider WD Red Pro hard drives.*
* WD hard drives are designed and tested for use in specic applications and environments. This ensures that your hard drive is compatible with and functions properly in your 
application. Our hard drives are warranted against defects in materials and workmanship in the system for which they were designed. Use in systems other than for what the hard drive 
was designed could result in compatibility problems that affect proper function, unrelated to material and/or workmanship defects. For best results, be sure to select the appropriate 
product for your application by consulting our product spec sheets on our website at www.wd.com or by calling our customer support line where we would be happy to help you 
through the selection process.



