What two 10TB drives provide in RAID1
Two equal 10 TB drives in RAID1 provide roughly 10 TB before formatting and reserved space. Redundancy protects availability in some failures; keep an independent backup.[1]
Western Digital · NAS hard drive buying guide
WD Red Plus 10TB (WD100EFGX) Buying Guide
Product facts and dated cost
Western Digital WD Red Plus 10TB · Exact identity: WD100EFGX
10TB decimal capacity · CMR · SATA 6 Gb/s
Catalog amount: $429.49 · historical · Price record: 2026-09-27T13:57:17.415334+00:00. Tax and shipping excluded.
Historical price observation. Recheck the price and availability before buying; this is not a current offer.
WD Red Plus 10TB: specifications and dated store comparison →A 7200 RPM 10TB Red Plus with one exact-suffix read figure; plan for heat and 34/39 dBA ratings.
One 10 TB WD100EFGX drive ·3.5-inch SATA ·CMR ·7200 RPM
The official WD100EFGX column lists CMR, 7200 RPM, 512 MB cache, 260 MB/s, 34/39 dBA, 8.8/6.1 W, 180 TB/year and a three-year warranty. SmartHDD records one exact-suffix sample, and two Japanese owners describe their installations. These add identity and use context, but do not provide a qualifying benchmark or controlled heat/noise comparison. Older WD100EFAX reviews concern different drives. ChooseCompute has not tested this model. See evidence and test gaps ↓
Is this 10TB drive right for your NAS?
Shared files and backup targets
CMR and the 180 TB/year class suit NAS data storage within the stated limits.[1]
A NAS beside your desk
34/39 dBA ratings plus a Kakaku owner who found it louder than WD80EFPX. 7200 RPM air 10TB is not a silent SKU.[1][6]
Latency-sensitive applications
Mechanical storage is capacity-oriented; application response depends on seeks and the whole NAS.[1]
Key hard drive specifications
Full specifications ↗Follow any specification for its full conditions and sources.
Living with it
Capacity, NAS workload and placement
Drive speed is only part of a NAS transfer
The 260 MB/s rating is an internal drive figure. Your NAS processor, network, filesystem, RAID and file sizes determine end-to-end transfers. Small-file applications also encounter mechanical seek delays.[1]
180TB/year workload and the eight-bay design
This model is rated for 180 TB/year of reads and writes. Annual workload is not lifetime writes. Red Plus is designed for up to eight bays; frequent transfers can consume the annual rating even if the drive is not full.[1]
Acoustic ratings and NAS placement
The datasheet lists 34 dBA idle and 39 dBA average seek. These are laboratory ratings, not noise measured at your desk. Mount securely, leave cooling clearance, and avoid relying on brand or family names to predict quietness.[1]
Why the WD100EFGX suffix matters
WD100EFGX uses air, 512 MB cache and 7200 RPM. Earlier same-capacity Red Plus models have different power, acoustics and performance. A review of an older EFBX model does not describe this drive.[1]
Do not borrow older 10TB Red numbers
StorageReview and Tom's Hardware 10TB Red articles describe earlier Red generations. WD101EFBX sits beside WD100EFGX in the current table with 256 MB and 215 MB/s. Use only the WD100EFGX column for this page's ratings.[1]
Exact-suffix SMARTHDD row and Japanese owners
SmartHDD names WD100EFGX-68CPLN0 / 85.00B85, one unit and one test: maximum read 257 MiB/s, buffered read 465 MiB/s, minimum average access 15.16 ms and recorded maximum temperature 39°C. Host, software version, test region and workload are undisclosed; these remain database observations. Kakaku author p1925 (June 9, 2025) used an Aoostar R7 and found the drive hotter/louder than WD80EFPX running in a different main-PC RAID setup, so the comparison is confounded by the enclosure. A December 3 owner used two 10TB drives in RAID1 and described quiet operation after replacing nine-year-old 3TB Reds. Neither report supplies instrumented noise or temperature comparisons.[5][6][7]
What still needs a real-world test
We have verified the specifications, but have not found an original test that we can reliably apply to this exact model. The advice above follows the documented features; performance, noise and long-term reliability are not independently established here.
Before you buy
Current and historical WD100EFGX listings and ownership costs
1 usable current main offer checked on 2026-09-10
Each current row keeps the selected main seller, condition, availability and only a price visible without a cart action. Null price means the main buy box hid it; every current fact is a dated observation that requires a fresh check before purchase.[4]
Compare the cost of usable storage
Budget for all drives in the array, backup capacity and eventual replacements. Compare the cost after your chosen redundancy overhead.[1]
Include power and the enclosure
The drive is rated at 6.1 W idle and 8.8 W read/write at room temperature. Actual consumption depends on operation; the NAS adds its own power.[1]
Verify the offered unit
Check WD100EFGX, one 10 TB drive, new condition, the actual seller and regional warranty. A retailer suffix is preserved in offer notes for verification.[1]
Compare stores for this exact model
One 10 TB WD100EFGX drive ·3.5-inch SATA ·CMR ·7200 RPM Check the total delivered price at the store.
Current price needs checking
Check stores below
4 stores · 0 recent price observations
Best Buy
Sold by Newegg Official
$429.49
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 1:57:17 PM UTC[11]
View exact product at Best BuyNewegg
Sold by Newegg
$459.99
Historical price
Stock not confirmed · New
One 10TB 3.5-inch SATA HDD
Observed shipping: $0.00
Observed Oct 9, 2026, 1:23:33 AM UTC[9]
View exact product at NeweggB&H
Sold by B&H Photo Video
$473.99
Historical price
Stock not confirmed · New
One 10 TB WD100EFGX 3.5-inch SATA internal NAS HDD
Check delivery availability and final shipping cost for your address. Price and stock are observations, not guarantees. Confirm exact MPN, new condition, seller and warranty before ordering. MFR WD100EFGX-SPCPLN0; exact base MPN, 10 TB and quantity 1; In Stock and Add to Cart.
Observed Sep 8, 2026, 3:49:13 PM UTC[2]
View exact product at B&HB&H
Seller not recorded
$473.99
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 27, 2026, 5:50:42 AM UTC[10]
View exact product at B&HWestern Digital
Seller not recorded
$494.99
Historical price
Currency not confirmed
Stock not confirmed · Condition not recorded
Observed Sep 26, 2026, 4:06:40 PM UTC[8]
View exact product at Western DigitalPrices are dated observations. Confirm the model, seller, condition, stock and delivered total at the store. Older prices remain visible as history. Links may earn a commission.
Compatibility, capacity and backup questions
Is this model CMR?
Yes; the official exact WD100EFGX column specifies CMR.[1]
Does the MTBF rating predict years of life?
No. It is a population estimate under specified workload and temperature conditions, not a promise for one drive.[1]
Does the NAS bay rating mean universal compatibility?
No. Check the exact enclosure, firmware and capacity qualification.[1]
Does RAID replace a backup?
No. Redundancy does not protect against every deletion, malware incident or whole-device loss. Keep an independent copy.[1]
Is there any exact-MPN speed number for WD100EFGX?
SMARTHDD lists one test of WDC WD100EFGX-68CPLN0 firmware 85.00B85 at 257 MiB/s maximum read and 15.16 ms access. That is a diagnostic peak on an unpublished host, not CrystalDiskMark and not a RAID result.[5]
Is the 10TB Red Plus quieter than the 8TB?
WD rates WD100EFGX at 34/39 dBA versus WD80EFPX at 24/28 dBA. One owner heard more noise, but used the 10TB and 8TB drives in different enclosures; another owner described quiet operation in a two-drive 10TB RAID1 setup. These are subjective experiences, not a controlled comparison.[1][6]
Sources
Research updated Sep 12, 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 WD100EFGX; footnotes 1–10
- [2] B&H WD100EFGX product listing ↗
Checked Sep 8, 2026 · MFR WD100EFGX-SPCPLN0; exact base MPN, 10 TB and quantity 1; In Stock and Add to Cart.
- [3] Western Digital WD100EFGX 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.
- [4] Newegg: WD100EFGX 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 $404.99.
- [5] SMARTHDD: WDC WD100EFGX-68CPLN0 firmware 85.00B85 ↗
Checked Sep 12, 2026 · General/Performance/Reliability tables; units tested 1; times tested 1
- [6] 価格.com p1925 review of WD100EFGX (2025-06-09) ↗
Checked Sep 12, 2026 · Japanese owner review body and score table; image is official specs
- [8] Western Digital product price observation ↗
Checked Sep 26, 2026 · Captured observation; sha256:423cb6c596165ebcea7110a4e4c4c3ab1f41cb2d04bac67ccec98cd101e31151
- [9] Newegg product price observation ↗
Checked Oct 9, 2026 · newegg-main-item; sha256:986924a061e06dd94bff7b775498240564a0b58257b69ff523b41f39a1f2be94
- [10] B&H product price observation ↗
Checked Sep 27, 2026 · Captured observation; sha256:3452d93af2555c3475d26697c71ebe814d12096c4066549f700f222fd3fc36d5
- [11] Best Buy product price observation ↗
Checked Sep 27, 2026 · Captured observation; sha256:1a6983a6d03982478e652f0a9f4e69fbdca0399d7387a11c93a1050706014d14
Research and review record
- Research: Grok 4.6 · Targeted additional original-source research for five mainstream HDDs.
- Self-check: Grok 4.6 · Source identity, method and data self-check; WD original session also verified the parent-supplied Zigsow lead.
- Independent review: GPT-6 (Codex) · Original evidence verification, applicability decisions and correction of incomplete case follow-up and document interpretation.
- Editorial integration: GPT-6 (Codex) · Preserve source history, update five local research records and existing coverage report.
Independent review completed for the scope recorded in the audit.
Source evidence and review history (JSON)