The 12TB Red Plus 7200 rpm SATA III 3.5" Internal NAS HDD from WD is built to handle the workloads of RAID-optimized NAS systems with up to 8 drive bays, including home offices and power users, small to medium businesses, and consumer and commercial NAS systems. This 12TB 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 196 MB/s. This drive also features high levels of reliability, with 600,000 load/unload cycles, < 1 in 10¹⁴ non-recoverable read errors per bits read, a workload rate of 180TB per year, dual-plane balance control technology, and a 1 million hours MTBF. WD's NASware helps increase system compatibility, allowing Red Pro drives to be more easily integrated with your existing network infrastructure, while noise and vibration protection is provided by Rotation Vibration (RV) sensors.

48TB Storage Capacity (4 x 12TB)    3.5" Form Factor    SATA III 6 Gb/s Interface    256MB Cache    7200 rpm    Data Transfer Speeds up to 196 MB/s    600,000 Load/Unload Cycles    1 Million Hours MTBF    Dual-Plane Balance Control    Noise and Vibration Protection

• 12TB storage capacity
• For RAID-optimized NAS systems with up to 8 bays
• Workload rating of up 180TB per year and 1 million hours MTBF

• Home offices and power users
• Small to medium businesses
• Commercial and consumer NAS systems

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

Since your NAS system is always on, a reliable drive is essential. WD Red Plus hard drives are designed for systems that operate 24/7, giving users the confidence of knowing they can reliably access their data.

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

WD Red Plus drives are engineered to use less power (versus previous models) and run cooler, which reduces operating costs and helps reduce heat in thermally challenged NAS boxes.

Despite using less power, the drives have plenty of bandwidth to handle the mixed performance demands of multi-drive NAS systems.

Hard drives that are not properly balanced may cause excessive vibration and noise in multi-drive systems, which could reduce hard drive life span and degrade the performance over time. WD's enhanced dual-plane balance control technology significantly improves balance and increases overall drive performance and reliability.

Western Digital stands behind their NAS storage solutions with the assurance of a limited 3-year limited warranty and world-class support services for hassle-free data storage.

Related Questions and Answers

Q: 1. 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: 2. Would these work in the DS1520+?

A: Yes, this WD 12TB Red Pro 7200 rpm SATA III 3.5" Internal NAS HDD (Retail), would work with the DS1520+.

Q: 3. Is this compatible with synology DS115?

A: Yes

Q: 4. What's the difference between the Red, Red Pro, and Retail Kit drives?

A: Red vs Red Pro: Basic diff Cost, RPM, Warranty, and application. Red should be for most home NAS setups with array of drives up to 8. Red Pro is geared more to small business/rack mounts, ect. If your setting up NAS with RAID, speed and Warranty should not be a big issue. prioritize cost and size.

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. What is the difference between this B&H item (a WD30EFRX drive) and the following B&H item: B&H # WEWD30EFRX MFR # WD30EFRX?

A: The difference is one is a retail package, meaning it is packaged in a Western Digital box and the other is a bare drive. Usually sent in the static bag and packaged appropriately to protect in shipment. Retail package generally costs more due to packaging from the manufacturer.

Q: 7. I'm buying multiple drives for a NAS. Why is it cheaper to buy 8 of these individually, and more expensive to buy the retail 8 pack?

A: This is an OEM drive which means that there is no manufacturer warranty. From Western Digital's website: OEM drives are sold without accessories or installation software. OEM drives may not contain a warranty from Western Digital. When Western Digital sells hard drives to OEM computer manufacturers such as Dell, Compaq, Apple, etc, we sell these drives without warranty. The OEM computer manufacturer would include the hard drive under the warranty of the computer system that the hard drive was installed into. For more information about hard drive warranties, please see our Warranty Policy. OEM drives do not have support available through Western Digital Customer Service and Support. If this hard drive came in an OEM system, check back with the OEM manufacturer for any support or possible updates. If you purchased this hard drive from a third party vendor, check back with the place of purchase.

Q: 8. What is Retail Kit ? I don't see any difference in spec's between the 4TB offered at $165.72 and the one that is marked retail Kit at $179.

A: Retail drives are drives that are distributed to retail stores and online dealers for sale to the general public. OEM drives are those sold to system manufacturers in large quantity, for inclusion in PCs built for resale: OEM stands for original equipment manufacturer and refers to a company that makes PCs (or other equipment). Retail kits include the drives, installation instructions, mounting hardware, interface cable, warranty card (this may vary from manufacturer to manufacturer and model to model). OEM drives include just the drive.

Q: 9. What is the spin rate (RPM?)

A: This is a 5400RPM HDD.

Q: 10. Does it work in the Synology DS1819+?

A: Yes, this would be compatible with DS1819+.