Which cache is correct for the 10TB WD100EFGX? The title says 512 and the drive selection button says 256?

Per ChatGPT, For the WD Red Plus WD100EFGX 10TB NAS hard drive, the official cache (buffer) size is 512 MB according to multiple current specs listings and reseller datasheets. However, it is possible to see listings online claiming 256 MB cache for the same model — that’s most likely due to incorrect listings, seller errors, or confusion with similar part numbers (e.g., WD101EFBX is another 10 TB Red Plus SKU that uses 256 MB cache). Hope that helps

Can I use the HD 10T|WD WD100EFGX for QNAP NAS drives?

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

How does the HD 10T|WD WD100EFGX perform in a home NAS server setup?

The WD Red Plus 10TB NAS Hard Disk Drive is designed for NAS systems, optimized for continuous operation, and features Western Digital’s exclusive NASware technology to enhance performance and reliability. It is rated for a workload of 180TB/year and has been tested for dependable compatibility with most NAS enclosures.

Is the HD 10T|WD WD100EFGX suitable for a small office NAS servers?

WD Red Plus hard drives are designed for systems that operate 24x7, making them suitable for NAS systems, which includes small office NAS servers.

What is the durability of this hard drive in terms of workload?

The hard drive is rated for a workload of 180TB/year.

How does this hard drive perform in terms of speed and capacity?

The hard drive has a capacity of 10TB and operates at 7200 RPM.

$459^.95

Free 30-day Returns

This product is available from Newegg.

Limit 99999 per customer.

Sold by Anand International Inc.

4.1 (7 seller ratings)

Shipped by Anand International Inc.

Price alert

Add to wish list

Best Sellers

Newegg

$329^.99
+ FREE SHIPPING

NothingButSavings

Top Rated

4.5 (9,002 total ratings)

$408^.03

PlatinumMicro

Top Rated

4.5 (7,196 total ratings)

$459^.99
+ FREE SHIPPING

Meet Your Seller

Anand International Inc.

See Seller Store

Main image of WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Alt view image 2 of 7 - WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Alt view image 3 of 7 - WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Alt view image 4 of 7 - WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Alt view image 5 of 7 - WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Alt view image 6 of 7 - WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Alt view image 7 of 7 - WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Customer images

Shop All Western Digital Products | Visit Anand International Inc. Store

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

(1,012)(2) Write a Review

Options: 10TB 512MB Cache

14TB 512MB Cache
10TB 512MB Cache
8TB 256MB Cache
6TB 256MB Cache
6TB 64MB Cache
4TB 128MB Cache
3TB 64MB Cache
2TB 64MB Cache
1TB 64MB Cache

Available in capacities ranging from 2TB to 12TB
For RAID-optimized NAS systems with up to 8 bays
Rated for 180TB/year workload and 1M hours MTBF
3-year limited warranty

🔥Don't forget your OS, we have Windows 11 OEM, Download and USB versions available

Overview

Specs

Reviews (1,012)

See all Q & A

WD Red Plus internal HDDs are designed to handle workloads for power users and small to medium business NAS environments. WD Red Plus drives deliver the speed and capacity required to store, protect and share growing amounts of data in mid-sized RAID-optimized NAS systems with increased power efficien

Best Seller Ranking	#1 in Desktop Internal Hard Drives

Model
Brand	WD
Series	Red Plus
Model	WD100EFGX

Performance
Interface	SATA 6.0Gb/s
Capacity	10TB
NAND Flash Memory Type	Hard Drive
Recording Technology	CMR
RPM	7200 RPM
Cache	512MB

Features
Features	Tuned for NAS with NASware™ Western Digital’s exclusive NASware™ technology fine tunes drive parameters to match NAS system workloads, which helps increase performance and reliability. Designed for Continuous Operation Since your NAS system is always on, a reliable drive is essential. WD Red Plus hard drives are designed for systems that operate 24x7, giving users the confidence of knowing they can reliably access their data. Tested for Dependable Compatibility Western Digital partners with a wide range of NAS system vendors for extensive testing to ensure compatibility with most NAS enclosures. Optimized for Lower TCO 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. Powered for Strong Performance Despite using less power, the drives have plenty of bandwidth to handle the mixed performance demands of multi-drive NAS systems. Balanced for Increased Reliability 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. Our enhanced dual-plane balance control technology significantly improves balance and increases overall drive performance and reliability. Backed by World-Class Support and Warranty As an industry-leading hard drive manufacturer, Western Digital stands behind their NAS storage solutions with the assurance of a 3-year limited warranty5 and world-class support services for hassle free data storage.
Usage	For NAS systems

Dimensions
Form Factor	3.5"
Height (maximum)	26.10mm
Width (maximum)	101.60mm
Length (maximum)	147.00mm

Additional Information
First Listed on Newegg	December 08, 2025

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Please contact the Seller directly for warranty information. Warranty information may also be found on the Manufacturer's website.
Read full details
CONTACT

Return Policies

Return for refund within: 30 days
Return for replacement within: non-replaceable
This item is covered by Anand International Inc. Return Policy

Manufacturer Contact Info

For a directory of all our manufacturers, please click below.
Manufacturers Directory

Best Sellers

Meet Your Seller

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Learn more about the Western Digital WD100EFGX

Customer Reviews of the Western Digital WD100EFGX

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info

Item#: 9SIAAR4KPS4818

Best Sellers

Meet Your Seller

WD Red Plus 10TB NAS Hard Disk Drive - 7200 RPM Class SATA 6Gb/s, CMR, 512MB Cache, 3.5 Inch - WD100EFGX

Learn more about the Western Digital WD100EFGX

Customer Reviews of the Western Digital WD100EFGX

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info