Western Digital Red Plus Internal Hard Drive 4 TB 5400 RPM 256 MB 3.5 Serial ATA WD40EFPX

Tackle intensity with a WD Red™ Hard Drive
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™ 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 NAS hard drives deliver exceptional performance for medium to large business customers 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.

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 3.5” HDDs 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.

Specs




Features


HDD capacity

The maximum storage capacity of the hard disk, usually measured in bytes e.g. GB.

4 TB


HDD speed

The rotational speed of a hard disk expressed in rotations per minute. The faster the better.

5400 RPM


Storage drive buffer size

256 MB


HDD size

The amount of data that the hard drive can store.

3.5"


Interface

Interface ports to connect pieces of equipment. USB (Universal Serial Bus) has become the most popular wired interface to connect peripherals. USB 2.0 supports speeds up to 480 Mbit/s (USB 1: 12 Mbit/s). The interface FireWire is also known as the IEEE 1394 standard. Enhanced IDE (EIDE)is sometimes referred to as Fast ATA, Fast IDE or ATA-2.

Serial ATA III


Type

Characteristics of the device.

HDD


Component for

What this product is used as a part of (component for).

NAS


Hot-swap




HDD interface transfer rate

6 Gbit/s


Advanced Format (AF)




24/7 operation




Start/stop cycles

600000


Native Command Queuing (NCQ)




Workload rate limit
0 TB/year


Noise level (idle)

23 dB



Features


Mean time between failures (MTBF)

Statistical model used to indicate product/mechanism reliability; expressed in hours and percentage of duty cycle. This number (in hours) does not indicate the mean time before failure for a single unit/mechanism.
00000 h


Power


Power consumption (standby)

The amount of electricity that is consumed when the product is on standby.

0.3 W


Power consumption (idle)

3.1 W


Operational conditions


Operating temperature (T-T)

The minimum and maximum temperatures at which the product can be safely operated.

0 - 65 °C


Storage temperature (T-T)

The minimum and maximum temperatures at which the product can be safely stored.

-40 - 70 °C


Operating shock

Environmental requirements for optimal protection from impact in operating mode

70 G


Non-operating shock

Environmental requirements for optimal protection from impact in non-operating mode

250 G


Weight & dimensions


Width

The measurement or extent of something from side to side.
1.6 mm


Height

The measurement of the product from head to foot or from base to top.

26.1 mm


Depth

The distance from the front to the back of something.
7 mm


Weight

Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.

570 g


Packaging data


Quantity per pack

1 pc(s)


Other features


Compliance certificates

RoHS