WD Red 4TB Internal NAS Hard Drive

WD 4TB Red 5400 rpm SATA III 3.5″ Internal NAS Hard Drive

Key Features
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

There’s a leading edge WD Red drive for every compatible NAS system to help fulfill your data storage needs. With drives up to 14TB, 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 112TB 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.

Keep it Cool
The always-on environment of a NAS or RAID is a hot one. WD Red drives are engineered to run cool and quiet while offering optimum compatibility for demanding 24×7 environments.

Designed For NAS
Desktop drives aren’t purpose-built for NAS. But WD Red drives with NASware 3.0 are. Our exclusive technology takes the guesswork out of selecting a drive. We can help you find the perfect storage for your NAS system.

3D Active Balance Plus
Helps to ensure your data is protected from excessive vibration and noise in a NAS or RAID environment. This dual-plane balance control maintains your drive’s performance over time.

Premium Support and a 3-year Limited Warranty
Confidently upgrade to the best in NAS drive performance with the assurance of a 3-year limited warranty and world-class support services included with every WD Red drive.

24/7 Environment
Since your NAS system is always on, a reliable drive is essential. Desktop drives are not typically designed and tested in 24×7 conditions, which is a foundation of WD Red NAS hard drives.

Exclusive Technology
Seamless integration, robust data protection and optimal performance for NAS systems under heavy demand.

Specifications
Model Number : WD40EFAX
Interface : SATA 6 Gb/s
Formatted capacity : 4TB
Form factor : 3.5-inch
Native command queuing : Yes
Advanced Format (AF) : Yes
RoHS compliant : Yes

Performance
Interface Transfer Rate : up to180 MB/s
Cache : 256
Performance Class : 5400 RPM Class

Reliability/Data Integrity
Load/unload cycles : 600,000
Non-recoverable read errors per bits read : <1 in 10
MTBF (hours) : 1,000,000
Workload Rate (TB/year): 180
Limited warranty (years) : 3

Power Management
12VDC ±5% (A, peak) : 1.75
5VDC ±5% (A, peak)
Average power requirements (W)
Read/Write : 4.8
Idle : 3.1
Standby and Sleep : 0.4

Environmental Specifications
Temperature (°C)
Operating : 0 to 60
Non-operating : -40 to 70
Shock (Gs)
Operating, (2 ms, read/write) : 30
Operating, (2 ms, read) : 65
Non-operating (2 ms) : 250
Acoustics (dBA)
Idle : 23
Seek (average) : 27

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%) : 1.26 / 0.57

What’s in the box
1 x WD 4TB Purple 7200 rpm SATA III 3.5″ Internal NAS Hard Drive
1 x Limited 3-Year Warranty