Engineered to deliver high performance and reliability to commercial and enterprise NAS environments, the 4TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD from WD is well-suited for multimedia and creative pros, medium to large businesses, and commercial and enterprise NAS systems. Able to work in RAID-optimized NAS systems with an unlimited number of drive bays, this 4TB drive operates using a SATA III 6 Gb/s interface, a 256MB cache, and a rotational speed of 7200 rpm, which all help to ensure uninterrupted data transfers with a rate of up to 267 MB/s. This drive also features high levels of reliability, with 600,000 load/unload cycles, < 1 in 10¹⁵ non-recoverable read errors per bits read, a workload rate of 550TB per year, dual-plane balance control technology, and 2 million hours MTBF. Shock protection is provided by a multi-axis shock sensor and WD's NASware helps increase system compatibility, allowing Red Pro drives to be more easily integrated with your existing network infrastructure.

16TB Storage Capacity (4 x 4TB)    3.5" Form Factor    SATA III 6 Gb/s Interface    256MB Cache    7200 rpm    Data Transfer Speeds up to 267 MB/s    600,000 Load/Unload Cycles    2 Million Hours MTBF    Multi-Axis Shock Sensor    NASware Technology

• 4TB storage capacity
• For RAID-optimized NAS systems with an unlimited number of bays
• Workload rating of up 550TB per year and up to a 2 million hours MTBF

• Multimedia creative pros
• Medium to large businesses
• Commercial and enterprise NAS systems

Western Digital's exclusive NASware technology fine tunes drive parameters to match NAS system workloads, which helps increase performance and reliability.

WD Red Pro hard drives are designed to handle the rigorous demands of high-intensity 24/7 multi-user NAS environments and increase system durability.

Western Digital partners with a wide range of NAS system vendors for extensive testing to ensure compatibility with most NAS enclosures.

WD Red Pro drives include Rotation Vibration (RV) sensors that anticipate and proactively counteract disturbances caused by increased vibration. By dispersing excess vibration across the drive chassis, turbulence is minimized, performance is maintained, and drives are protected.

WD Red Pro hard drives include a multi-axis shock sensor to detect subtle shock events and automatically compensate with dynamic fly height technology to further protect the drives in NAS enclosures.

Western Digital stands behind their NAS storage solutions with the assurance of a limited 5-year limited warranty and world-class support services for hassle free data storage.

Related Questions and Answers

Q: 1. Is this compatible with synology DS115?

A: Yes

Q: 2. What is the warranty?

A: This product has a Limited 3-Year Warranty.

Q: 3. What is the difference between Red and Retail Kit?

A: Package is diff, HDD itself is the same. (Red in brown box, Retail in printed box)

Q: 4. What is the spin rate (RPM?)

A: This is a 5400RPM HDD.

Q: 5. Is this the CMR drive (WD40EFRX) in the box or the SMR drive (WD40EFAX) in the box? Review here says SMR drive but based on google search of the model number listed supposed to be the CMR drive. Thanks !!!

A: This drive is SMR. The Ultrastar line are all CMR. https://www.bhphotovideo.com/c/product/1463047-REG/wd_wdbbur0040bnc_wrsn_ultrastar_4tb_3_5_drive.html

Q: 6. Can I use it with desktop as second HDD?

A: Yes you certainly can. However, I use them for data and not gaming. I prefer a black or raptor for gaming....or a spare SSD if you are flush.

Q: 7. How are the 10tb reds noise wise? are they load?

A: I have 4 of them in a NAS. When spinning, each one is a little more audible than an old Seagate Barracuda 4TB drive in same NAS. Also, one out of the 4 Red 10TB drives hums much much louder than the whole rest of the NAS, so your mileage may vary... a lot.

Q: 8. So is this a WD100EFAX drive in the box or something else? WDBMMA0100HNC-WRSN isn't listed anywhere I can find!

A: I ordered on a few days ago for my NAS and received the WD101EFAX (air filled). I was hoping for the WD100EFAX (helium filled) because I have four of those already in my RAID array and four empty slots and I wanted them all to match. I guess it doesn't matter. From what I can tell, the only real difference is it runs a few degrees hotter due to the air filled design instead of helium. WD100EFAX 36C/97F vs WD101EFAX 41C/106F.

Q: 9. Where do i find warranty information for drives? Trying to decide which ones to get.

A: The warranty would be listed in the in the box tab on the product page. This would come with a Limited 3-Year Manufacturer Warranty.

Q: 10. Will this work with Thunder3 RAID Station from AKiTiO ?

A: Yes, the WD 4TB Red B&H # WEWD40EFR is compatible with the Akitio Thunder3 Raid Station.