Western Digital WD40EFRX 4TB 64M SATA3 Intellipower NAS RED

SKU
182730
MPN
WD40EFRX
Warranty
1 Year Manufacturer's return to base

No Longer Available

Special Price $255.00 Regular Price $293.00
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NAS Hard Drives
WD Red
Features

Expanded solutions
Our formula of success has led growth of WD Red into higher capacities and expansion into new 2.5-inch solutions. We now offer a broader, more comprehensive portfolio of NAS hard drives for our customers. It is not just about NAS drives, it is REDvolutionary.
Next generation experience
Every component, line of code, and product decision was built on our passion and determination to deliver the best NAS experience.The next generation of WD Red hard drives delivers on this promise with massive capacity and NASware 2.0, which further improves drive reliability and protects your data in the event of a power loss or power disruption.
Experienced in NAS
In all of our cultures around the world, first impressions are what leave a mark. With superior technology that is driven to impress, WD Red is a reflection of the most extensive NAS partner compatibility-testing list that is available on the market*. That means when you buy a NAS enclosure, you can trust that WD Red will be the most compatible drive available. Our pride is in our product and our vision is shared with our customers.
NAS for home
Take your connected home environment to the next level with a NAS system that is equipped with WD Red hard drives and enjoy streaming your media, backing up your computers, file sharing and managing your digital content faster and easier.
WD Red's NASware 2.0 experience with increased compatibility makes sharing from your mobile device, computer, TV, stereo and more an instant gratification. And with capacities now available in 4 TB, a 5-bay NAS system can hold close to 20 terabytes of data!
NAS for small business
Increase the efficiency and productivity of your small business with WD Red hard drives for your 1 to 5 bay NAS system. WD Red comes equipped with NASware 2.0, 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 NAS hard drives in your NAS solution.

Exclusive NASware 2.0 technology
Our exclusive technology, NASware 2.0, makes WD Red thrive in the demanding small-NAS environment. By adding WD Red to your NAS system, not only is everything more efficient and reliable, you get to enjoy a REDvolutionary NAS experience.
3D Active Balance Plus
Our enhanced dual-plane balance control technology significantly improves the overall drive performance and reliability. Hard drives that are not properly balanced may cause excessive vibration and noise in a multi-drive system, reduce the hard drive life span, and degrade the performance over time.
The right choice
The right choice for, no other drive is designed specifically for home and small office NAS systems and PCs with RAID.
Enhanced reliability
Since your NAS system is always on, a highly reliable drive is essential. With a 35% MTBF improvement over standard desktop drives, the WD Red drive with NASware 2.0 is designed and manufactured to be a more reliable and robust solution.
NAS compatibility
Advanced firmware technology built into every WD Red drive, NASware 2.0 enables seamless integration, robust data protection and optimal performance for systems operating in NAS and RAID environments.
The secret is the next-generation technology
WD's next generation NASware 2.0 technology improves NAS storage performance by reducing common hard drive concerns in NAS systems. This includes concerns for things like compatibility, integration, upgrade ability, reliability and cost of ownership that are experienced with a hard drive designed for desktop computers.
Longer warranty coverage
We keep power consumption low, which keeps your NAS system happy, and your wallet too.
Energy efficient and money saving
We keep power consumption low, which keeps your NAS system happy, and your wallet too.
Lower operating temperatures
Reduce your electricity bill and carbon footprint with WD Red drives. Innovative technology reduces power consumption and lowers the operating temperature, resulting in a more reliable and affordable solution for always on 24x7 NAS environments.
Longer warranty coverage
We keep power consumption low, which keeps your NAS system happy, and your wallet too.
Need help? We offer premium support.
Every WD Red hard drive comes with our world-class professional support services including a premium dedicated 24/7 support line and a 3-year limited warranty.
Ideal for:
Specifically designed and tested for small office and home office, 1-5 bay NAS systems, small media servers and PCs with RAID.
Next generation 2.0 experience
Every component, line of code, and product decision was built on our passion and determination to deliver the best NAS experience. The next generation of WD Red hard drives delivers on this promise with massive capacity and NASware 2.0, which further improves drive reliability and protects your data in the event of a power loss or power disruption.
WD's exclusive NASware technology, built into every WD Red hard drive.
WD's exclusive NASware 2.0 technology, which is built into every WD Red hard drive, improves NAS storage performance by reducing common hard drive concerns in NAS systems. They include concerns for things like compatibility, integration, upgradeability, reliability and cost-of-ownership that are experienced with a hard drive designed for desktop computers.
Desktop hard drives are designed for desktop computers.
WD Red is for NAS.
Desktop hard drives are designed for optimum performance and reliability in a desktop personal computer. Although they are an affordable alternative to enterprise-class drives, desktop drives have a higher level of risk for potential data loss and failure in an always-on RAID configured NAS system. Specific issues that you may experience using desktop drives in a NAS or RAID environment include:
Compatibility - Desktop hard drives are not always tested for compatibility in NAS and can present problems during integration.
Reliability - Most desktop drives are not designed for the high operating temperatures or always on, 24x7 operating environments making them less reliable when used in a NAS system.
Error recovery controls - Desktop drives are not traditionally designed for RAID environments and have controls that prevent the RAID controller from assisting in the event of an error which can cause the hard drive to drop off the RAID after a period of time. Rebuilding a RAID often requires several hours and can have a significant impact on downtime and productivity.
Noise and vibration - Typically designed for single drive applications, average desktop drives are not optimized for multi-drive systems which have higher noise and vibration levels. When these drives are added to a NAS, the additional vibration can reduce the reliability and life span of the drive.

Save power and money
NASware 2.0 further improves drive reliability and protects your data in the event of a power loss or power disruption. WD Red's optimized power usage results in significant power savings and lower hard drive operating temperatures within a small NAS environment, improving the overall reliability and performance of the drive and reduces the NAS cost of ownership.
Beyond the Desktop with NASware 2.0
WD Red drives include WD's exclusive NASware 2.0 technology that addresses many of the challenges a traditional desktop hard drive has in a NAS system. WD works directly with our partners to test compatibility and reduce our customer's guess work as to which drive is right for their NAS system. Designed to deliver a better customer experience in small NAS systems, this innovative firmware finely balances the most important attributes of performance, power, and reliability in multiple drive environments. The unique algorithms in NASware 2.0 optimize power and performance without compromising on the attributes that NAS-system owner's value.
Intelligent error recovery
With built in intelligent error recovery controls, NASware 2.0 also prevents hard drives from being dropped off the RAID due to extended error recovery. This feature provides more availability and less down time when rebuilding the RAID.
Command completion
To further improve reliability, NASware 2.0 minimizes the data corruption or loss in the event of an unexpected power loss by completing the command in process before shutting down.
Important features for system integrators
In addition to features that make WD Red drives perfect for populating or upgrading NAS systems, NASware 2.0 brings features that system integrators need when building specialized NAS systems.
Streaming Support - NASware 2.0 provides built-in compatibility with the ATA Streaming Feature Set, which is important for AV storage applications such as Windows Media Center.
SMART Command Transport (SCT) support - NASware 2.0 allows monitoring and measuring of drive performance via the SMART command set. SMART can return data like thermal profiles, drive access statistics and more. NASware 2.0 also delivers temperature accuracy within 1C.
Power Management Support - Enables optimized power usage within the NAS system and protects your data in the event of a power loss or disruption.
Best In Class Performance Performance - Optimized seek to provide Best In Class Performance performance while reducing the power and acoustics.
Specifications:
Product Specifications
Interface SATA 6 Gb/s
Performance Specifications
Rotational Speed IntelliPower *
Buffer Size 64 MB
Transfer Rates
Buffer To Host (Serial ATA) 6 Gb/s (Max)
Physical Specifications
Formatted Capacity 4,000,787 MB
Capacity 4 TB
User Sectors Per Drive 7,814,037,168
Performance Specifications
Target Performance
MTBF 1,000,000 hours
Physical Dimensions
English
Height 1.028 Inches
Depth 5.787 Inches
Width 4.00 Inches
Weight 1.50 Pounds
Metric
Height 26.1 mm
Depth 147 mm
Width 101.6 mm
Weight 0.68 kg
Environmental Specifications
Shock
Operating Shock (Read) 65G, 2 ms
Non-operating Shock 250G, 2 ms
Acoustics
Idle Mode 25 dBA (average)
Seek Mode 0 28 dBA (average)
Temperature (English)
Operating 32 F to 158 F
Non-operating -40 F to 158 F
Temperature (Metric)
Operating -0 C to 70 C
Non-operating -40 C to 70 C
Humidity
Operating 5-95% RH non-condensing
Vibration
Operating 0.004 g/Hz (10 to 300 Hz)
Non-operating 0.05 g/Hz (10 to 300 Hz)
Operating
Linear 20-300 Hz, 0.75G (0 to peak)
Electrical Specifications
Current Requirements
12 VDC
Read/Write 250 mA
Idle 230 mA
Standby 7 mA
Sleep 7 mA
5 VDC
Read/Write 280 mA
Idle 260 mA
Standby 105 mA
Sleep 105 mA
Power Dissipation
Read/Write 4.50 Watts
Idle 3.30 Watts
Standby 0.40 Watts
Sleep 0.40 Watts
Compatibility
Operating System
Compatibility Windows/Mac

Model number WD Red ( WD40EFRX)
Brand Western Digital
Cache 64MB
Data transfer rate (max) (max) 150 MB/s (Max)
Capacity 4 TB
Interface SATA III 6.0Gb/s
Dimensions 101.6 x 26.1 x 147 (W x H x D mm)
Form Factor 3.5"
Rotational speed IntelliPower
Warranty 3 Year
Weight 0.68 kg