Western Digital Red Plus WD40EFPX internal hard drive 3.5" 4000 GB Serial ATA III

Tackle intensity with a WD Red Hard DrivePacked 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 BusinessesStream, 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 3.0Not 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 CompatibilityWD 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 BusinessIf 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 PlusOur 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 EnvironmentSince 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 PlusDo 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.

Features
HDD size:	3.5"
HDD capacity:	4000 GB
HDD speed:	5400 RPM
Interface:	Serial ATA III
Type:	HDD
Component for:	NAS
Hot-swap:
Storage drive buffer size:	256 MB
HDD interface transfer rate:	6 Gbit/s
Advanced Format (AF):
24/7 operation:
Start/stop cycles:	600000
Native Command Queuing (NCQ):
Workload rate limit:	180 TB/year
Noise level (idle):	23 dB
Mean time between failures (MTBF):	1000000 h
Power
Power consumption (standby):	0.3 W
Power consumption (idle):	3.1 W
Operational conditions
Operating temperature (T-T):	0 - 65 °C
Storage temperature (T-T):	-40 - 70 °C
Operating shock:	70 G
Non-operating shock:	250 G
Technical details
Sustainability certificates:	RoHS
Weight & dimensions
Width:	101.6 mm
Height:	26.1 mm
Depth:	147 mm
Weight:	570 g
Packaging data
Quantity:	1