Western Digital
Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD (WD120EFAX)
Bottom line: The Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD ($697.10 on Amazon as of 2026-10-20 22:15 UTC): CMR recording, not SMR, so RAID and ZFS rebuilds finish predictably; main trade-off: 5400 RPM class trails 7200 RPM drives on random access.
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*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.
Pros & Cons
Pros
- ✓ CMR recording, not SMR, so RAID and ZFS rebuilds finish predictably
- ✓ Rated for 180 TB/yr workload in 24x7 operation
- ✓ 256 MB cache with SATA 6 Gb/s interface
- ✓ Validated for 1 to 8 bay NAS chassis
Cons
- ✗ 5400 RPM class trails 7200 RPM drives on random access
- ✗ 3-year warranty is shorter than WD Red Pro coverage
- ✗ Confusing labeling: box may still read WD Red, not Red Plus
- ✗ At 599.99 list, cost per TB beats smaller drives but the entry price is steep
Manufacturer description
The headline detail is CMR: this model uses conventional magnetic recording rather than the SMR technology found in the standard WD Red line, which is why rebuilding a ZFS pool or a RAID array on it behaves predictably instead of stalling on sustained writes. Western Digital rates the drive for workloads up to 180 TB per year and validates it for bays 1 through 8, so it slots cleanly into a Synology, QNAP, or TrueNAS chassis without the vibration and compatibility guesswork of a desktop drive. NASware firmware handles the multi-bay error recovery and power management side. With 256 MB of…
SpecPicks Verdict
SpecPicks scored Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD using a rating × review-volume × price-fit model applied to published specs and reviews across the nas & home servers category. Western Digital's nas & home servers lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for nas & home servers of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Is the WD120EFAX CMR or SMR?
CMR. Western Digital states this model uses conventional magnetic recording, which is exactly why it carries the WD Red Plus name instead of plain WD Red, a line that uses SMR.
Why does my drive say WD Red instead of WD Red Plus?
Western Digital renamed this product mid-production, so during the transition units may ship with a WD Red label. Confirm the model number reads WD120EFAX and you have the CMR version.
How many drive bays does it support?
It is built and tested for NAS systems of up to 8 bays, covering most SOHO and small business enclosures from Synology, QNAP, and similar vendors.
What workload rating does it carry?
Up to 180 TB per year. Western Digital defines workload rate as user data transferred to or from the drive, annualized as TB transferred times 8760 divided by recorded power-on hours.
What warranty comes with it?
A 3-year limited warranty. Check the product listing for current terms and regional coverage before you buy.
Key Features
- Available in capacities ranging from 1-14TB with support for up to 8 bays
- 5400RPM performance class
- Supports up to 180 TB/yr workload rate*| * Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred ✕ (8760 / recorded power-on hours))
- NASware firmware for compatibility
- Small or medium business NAS systems in a 24x7 environment
- 3-year limited warranty
Full Specifications
| Brand | Western Digital |
|---|---|
| Color | Red |
| Model Name | WD Red |
| Unit Count | 1 Count |
| Form Factor | 3.5-inch |
| Model Number | WD120EFAX |
| Built-In Media | HDD |
| Item Type Name | Hard Disk Drive |
| Hard-Drive Size | 12 TB |
| Mfr Part Number | WD120EFAX |
| Number of Items | 1 |
| Special Feature | Portable |
| Hardware Platform | Mac, PC |
| Installation Type | Internal Hard Drive |
| Compatible Devices | Desktop |
| Data Transfer Rate | 196 megabits_per_second |
| Enclosure Material | Aluminum |
| Additional Features | Portable |
| Hard Disk Interface | Serial ATA |
| Warranty Description | 3-year limited manufacturer |
| Full listing title | Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD120EFAX |
Ready to buy?
Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 5400 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD120EFAX is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.
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