WD Red Plus NAS Hard Drive WD40EFRX - hard drive - 4 TB - SATA 6Gb/s
Mfg # WD40EFRX
CDW # 3123305
Quick tech specs
- Hard drive
- internal
- SATA 6Gb/s
- for My Cloud EX2; EX4
- 4 TB
- 3.5"
- buffer: 64 MB
Know your gear
Tackle Intensity with WD Red Plus
Packed with power to handle the small- to medium-sized business NAS environments and increased workloads for SOHO customers, WD Red Plus is ideal for archiving and sharing, as well as RAID array rebuilding
on systems using ZFS and other file systems. Built and tested for up to 8-bay NAS systems, these drives give you the flexibility, versatility, and confidence in storing and sharing your precious home and work files.
For Small or Medium Businesses
Stream, backup, share, and organize your digital content with a NAS and WD Red Plus drives designed to effortlessly share content with the devices at your home or business. NASware 3.0 technology increases your drives'
compatibility with your existing network and devices. For larger businesses with up to 24 bays, count on WD Red Pro drives to deliver exceptional performance.
Exclusive NASware 3.0
Not just any drive will do. Get up to 112TB of capacity in your 8-bay NAS system and with Western Digital's exclusive NASware 3.0 technology, you can optimize each and every drive. Built into every WD Red Plus hard drive,
NASware 3.0's advanced technology improves storage performance by increasing compatibility, integration, upgradeability, and reliability.
Built for Optimum NAS Compatibility
WD Red Plus drives with NASware technology takes the guesswork out of selecting a drive. Optimized for NAS systems, our unique algorithm balances performance and reliability in NAS and RAID environments. Simply put,
a WD Red Plus drive is one of the most compatible drives available for NAS enclosures. But don't take our word for it. WD Red Plus drives are a reflection of extensive NAS partner technology engagement and compatibility-testing.
WD Red Pro for Big Business
If you're looking for heavy duty performance for NAS, WD Red Pro drives deliver exceptional performance for the medium to large business customer with extreme demands. For NAS environments with 9 to 24 bays,
WD Red Pro drives deliver uncompromising performance and unwavering assurance backed by a 5-year limited warranty.
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.
24/7 Environment
Since your NAS system is always on, a reliable drive is essential. With an MTBF of up to 1 million hours, the WD Red Plus drive is engineered to tackle 24x7 environments.
Premium Support and a 3-year Limited Warranty
Confidently upgrade your NAS performance with the assurance of a 3-year limited warranty, coupled with world-class support services included with every WD Red Plus drive.
Desktop Drives vs. WD Red Plus
Do right by your NAS and choose the drive purpose-built 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: Unlike desktop drives, these drives are specifically tested for compatibility with NAS systems for optimum performance.
Reliability: The always-on environment of a NAS or RAID is a hot one, and desktop drives aren't typically designed and tested under those conditions like WD Red Plus drives are.
Error Recovery Controls: WD Red Plus NAS hard drives are specifically designed with RAID error recovery control to help reduce failures within the NAS system.
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 Plus drives are designed to thrive in multi-bay NAS system environments.
Packed with power to handle the small- to medium-sized business NAS environments and increased workloads for SOHO customers, WD Red Plus is ideal for archiving and sharing, as well as RAID array rebuilding
on systems using ZFS and other file systems. Built and tested for up to 8-bay NAS systems, these drives give you the flexibility, versatility, and confidence in storing and sharing your precious home and work files.
For Small or Medium Businesses
Stream, backup, share, and organize your digital content with a NAS and WD Red Plus drives designed to effortlessly share content with the devices at your home or business. NASware 3.0 technology increases your drives'
compatibility with your existing network and devices. For larger businesses with up to 24 bays, count on WD Red Pro drives to deliver exceptional performance.
Exclusive NASware 3.0
Not just any drive will do. Get up to 112TB of capacity in your 8-bay NAS system and with Western Digital's exclusive NASware 3.0 technology, you can optimize each and every drive. Built into every WD Red Plus hard drive,
NASware 3.0's advanced technology improves storage performance by increasing compatibility, integration, upgradeability, and reliability.
Built for Optimum NAS Compatibility
WD Red Plus drives with NASware technology takes the guesswork out of selecting a drive. Optimized for NAS systems, our unique algorithm balances performance and reliability in NAS and RAID environments. Simply put,
a WD Red Plus drive is one of the most compatible drives available for NAS enclosures. But don't take our word for it. WD Red Plus drives are a reflection of extensive NAS partner technology engagement and compatibility-testing.
WD Red Pro for Big Business
If you're looking for heavy duty performance for NAS, WD Red Pro drives deliver exceptional performance for the medium to large business customer with extreme demands. For NAS environments with 9 to 24 bays,
WD Red Pro drives deliver uncompromising performance and unwavering assurance backed by a 5-year limited warranty.
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.
24/7 Environment
Since your NAS system is always on, a reliable drive is essential. With an MTBF of up to 1 million hours, the WD Red Plus drive is engineered to tackle 24x7 environments.
Premium Support and a 3-year Limited Warranty
Confidently upgrade your NAS performance with the assurance of a 3-year limited warranty, coupled with world-class support services included with every WD Red Plus drive.
Desktop Drives vs. WD Red Plus
Do right by your NAS and choose the drive purpose-built 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: Unlike desktop drives, these drives are specifically tested for compatibility with NAS systems for optimum performance.
Reliability: The always-on environment of a NAS or RAID is a hot one, and desktop drives aren't typically designed and tested under those conditions like WD Red Plus drives are.
Error Recovery Controls: WD Red Plus NAS hard drives are specifically designed with RAID error recovery control to help reduce failures within the NAS system.
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 Plus drives are designed to thrive in multi-bay NAS system environments.
Enhance your purchase
Western Digital Red 4 TB Internal HDD is rated4.81 out of5 by16.
Rated 5 out of 5 bygregp from Great drivesNice and not too expensive 4TB drive. Used for QNAP
Date published: 2015-06-02T00:00:00-04:00
Rated 5 out of 5 byKP1123 from Good reliable drivesI've never had one of these drives fail on me. I most often use them in large RAID configs in our NAS hardware.
Date published: 2016-08-24T00:00:00-04:00
Rated 5 out of 5 byJoeC from Used with Synology DS1817+I purchased WD Reds for my DS1817+ due to the price and reliability of these drives. No issues so far!
Date published: 2017-05-31T00:00:00-04:00
Rated 5 out of 5 byMike from another great WD productWestern Digital drives continue to be very good products.
Date published: 2019-02-20T00:00:00-05:00
Rated 5 out of 5 bySputxx from Best bang for the backWe use these drives to populate our iSCSI servers in a RAID 6 configuration. Quality is consistent and failure rate confirms to posted MTBF. Purchased eight of them recently and no issues.
Date published: 2014-11-11T00:00:00-05:00
Rated 5 out of 5 byricky777 from Excellent External DriveUse: Synology RackStations NASExcellent DrivesHave been using these drives for awhile now(few years)with no failures to date.I would definitely recommend these for a NAS. Thank YouRick
Date published: 2016-11-16T00:00:00-05:00
Rated 5 out of 5 bympz9 from Great Drive for NASWe use the WD Red drives in all of our NAS deployments. Drives have been extremely reliable.
Date published: 2016-01-26T00:00:00-05:00
Rated 5 out of 5 byGatorEd from AWESOME PRODUCTWe have been updating our back up systems and are using these drives in our NAZ Box! Great choice!
Date published: 2015-12-15T00:00:00-05:00
Rated 5 out of 5 bydwiseman from Good product.The hard drive seems to be in good working order and the product in general seems to have a good shelf life.
Date published: 2017-08-09T00:00:00-04:00
Rated 5 out of 5 byRH434 from Good Drives. Time will tell about reliability!I used 4 of these in a Netgear NAS box for backup purposes, so no live critical data. So far they have been humming along fine with no failures. They seem to be quiet, cool and so far a very reasonable investment.I prefer to buy drives at CDW vs. the other places due to packaging alone. I have not had a DOA from them yet.
Date published: 2013-11-12T00:00:00-05:00