Technical reference
Western Digital WD Red Plus WD120EFGX 12TB specifications
One 12 TB WD120EFGX drive ·3.5-inch SATA ·CMR ·7200 RPM
Complete specifications with requirements, upgrade limits and sources. For our buying judgment, reviews and prices, return to the buying guide.
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Search all 36 specifications, including conditions and limits.
Identity
Exact-model ratings and their applicable conditions.
| Exact model | WD120EFGX[1] |
|---|---|
| Marketed capacity | 12 TB[1] Decimal capacity; formatting, filesystem and redundancy reduce usable space. |
| Form factor | 3.5-inch[1] |
| Interface | SATA 6 Gb/s[1] |
| Recording technology | CMR[1] |
| Drive atmosphere | Air[1] |
| Advanced Format | Yes[1] The table confirms AF; it does not separately specify the logical sector size. |
| Native command queuing | Yes[1] |
| RoHS compliant | Yes[1] EU 2011/65/EU and 2015/863. |
| Same-capacity related MPN | WD120EFBX is a helium 12TB Red Plus (256 MB, 196 MB/s, 20/29 dBA) and is not this SKU[1] |
Performance
Exact-model ratings and their applicable conditions.
| Spindle speed | 7200 RPM[1] Footnote 7: actual spindle is 7200 RPM; ID Device may report 5400 to reflect a previous performance-class label. |
|---|---|
| Cache | 512 MB[1] |
| Maximum internal transfer rate | 260 MB/s[1] Manufacturer internal testing; host, capacity and workload affect results. Not a network-copy result. |
NAS and reliability
Exact-model ratings and their applicable conditions.
| NAS bay rating | Up to 8[1] Rating does not establish exact enclosure/firmware compatibility. |
|---|---|
| Operation | 24 × 7[1] |
| NASware | NAS-optimized drive parameters[1] |
| Dual-plane balance control | Yes[1] |
| Annual workload rate | 180 TB/year[1] Annualized transferred data: TB transferred ×8760 / recorded power-on hours; not lifetime TBW. |
| MTBF rating | 1 million hours[1] Population estimate at90TB/year and40°C drive temperature; derates above these parameters up to65°C. Not an individual-drive lifespan or warranty. |
| Load/unload cycles | 600, 000[1] Controlled unload at ambient conditions. |
| Nonrecoverable read errors | <1 in 10^14 bits read[1] |
| Limited warranty | 3 years[1] Region-specific conditions apply; confirm seller and serial number coverage. |
Power and acoustics
Exact-model ratings and their applicable conditions.
| Peak 12V current | 1.9 A[1] 12VDC ±5%; allow for simultaneous drive startup. |
|---|---|
| Average read/write power | 8.8 W[1] Room/ambient-temperature measurement; not maximum PSU demand. |
| Average idle power | 6.1 W[1] Room/ambient-temperature measurement. |
| Standby / sleep power | 0.3 W[1] Room/ambient-temperature measurement. |
| Idle acoustics | 34 dBA[1] Manufacturer rating; not room noise at your listening position. |
| Average seek acoustics | 39 dBA[1] Enclosure vibration and placement affect perceived noise. |
Environment and dimensions
Exact-model ratings and their applicable conditions.
| Operating temperature | 0 °C to 65 °C[1] |
|---|---|
| Non-operating temperature | −40 °C to 70 °C[1] |
| Operating shock, read/write | 70 g, 2 ms[1] |
| Operating shock, read | 70 g, 2 ms[1] |
| Non-operating shock | 250 g, 2 ms[1] |
| Maximum height / length | 26.1 /147 mm[1] |
| Width | 101.6 mm ±0.254 mm[1] |
| Weight | 750 g ±10%[1] |
Exact product identity & open questions
- Exact NAS compatibility: Family rating is up to 8 bays. Synology/QNAP/Asustor lists were not confirmed for this exact MPN in this round.
- RV sensors and sector size: The exact-model table does not list RV sensors or logical/physical sector bytes.
- B&H and Amazon live price: B&H TCP reset; no usable Amazon US PDP this round. Dated B&H 538.99 (2026-09-08) is historical.
- Exact-MPN original video: No WD120EFGX lab video with ASR/frames was obtained. YouTube DXM7znUSIPg is a 4TB family comparison, not this SKU.
- Original review images: The original article body was reread; image downloads remained blocked. Reported180–195MB/s write range is supported by the text, without additional chart results inferred.
Sources
Research updated Sep 11, 2026. Individual source check dates are listed below. Measurements belong to the named reviewers; tested configurations and software versions may differ from the product you buy.
- [1] WD Red Plus HDD data sheet (September 2025) ↗
Checked Sep 11, 2026 · September 2025 p.2 column WD120EFGX; footnotes 1–10
- [2] Newegg WD120EFGX product listing ↗
Checked Sep 8, 2026 · Primary offer sold and shipped by Newegg; Add to cart; limit 2 per customer; new standard listing.
- [3] B&H WD120EFGX product listing ↗
Checked Sep 8, 2026 · MFR WD120EFGX-SPCPHN0; exact base MPN, 12 TB and quantity 1; In Stock and Add to Cart.
- [4] Western Digital WD120EFGX product listing ↗
Checked Sep 8, 2026 · Exact SKU title/model confirmed; price and inventory appear as unresolved template fields. No stock inference from hidden buttons.
- [5] Test WD Red Plus 12 TB ↗
Checked Sep 10, 2026 · Opening exact MPN; RAID1 setup; network transfer and noise sections
- [6] Newegg: WD120EFGX current US new listing ↗
Checked Sep 10, 2026 · Exact MPN in H1; selected main offer shows Add to cart, seller Newegg, and a visible price of $459.99.
Research and review record
- Research: Grok 4.6 · Source research and data update
- Self-check: Grok 4.6 · Researcher self-check
- Independent review: GPT-6 (Codex) · Exact official MPN specifications, power/acoustic/environment columns and footnotes; original test evidence and applicability; primary merchant states and dated retained offers. Partial coverage and original-image/video gaps remain explicit.
- Editorial integration: GPT-6 (Codex) · Editorial integration and validation
Independent review completed for the scope recorded in the audit.
Source evidence and review history (JSON)