I have a WD EX2 Ultra in mirror mode. I want it for a backup to pop in and rebuild my raid 1 mirror in case one of the older one fails. Will this be compatible with my older WD30EFRX drive, even though it is a red, not plus, and 64MB cache and not 128? Just put it in and rebuilt?

I have mixed brands in EX2 before without problem, but I have never done it as part of a rebuild --

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WD Red Plus 3TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 128MB Cache, 3.5 Inch - WD30EFZX

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Options: 3TB 128MB Cache

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

Available in capacities ranging from 1-14TB with support for up to 8 bays
Supports up to 180 TB/yr workload rate
NASware firmware for compatibility
Small or medium business NAS systems in a 24x7 environment
3-year limited warranty

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

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Model
Brand	WD
Series	Red Plus
Model	WD30EFZX

Performance
Interface	SATA 6.0Gb/s
Capacity	3TB
NAND Flash Memory Type	Hard Drive
Recording Technology	CMR
RPM	5400 RPM
Cache	128MB

Features
Features	Tackle Intensity with WD Red Plus Packed with power to handle the small- to medium-sized business NAS environments and increased workloads for SOHO customers, WD Red Plus is ideal for archiving and sharing, as well as RAID array rebuilding on systems using ZFS and other file systems. Built and tested for up to 8-bay NAS systems, these drives give you the flexibility, versatility, and confidence in storing and sharing your precious home and work files. For Small or Medium Businesses Stream, backup, share, and organize your digital content with a NAS and WD Red Plus drives designed to effortlessly share content with the devices at your home or business. NASware 3.0 technology increases your drives' compatibility with your existing network and devices. For larger businesses with up to 24 bays, count on WD Red Pro drives to deliver exceptional performance. Exclusive NASware 3.0 Not just any drive will do. Get up to 112TB of capacity in your 8-bay NAS system and with Western Digital's exclusive NASware 3.0 technology, you can optimize each and every drive. Built into every WD Red Plus hard drive, NASware 3.0's advanced technology improves storage performance by increasing compatibility, integration, upgradeability, and reliability. Built for Optimum NAS Compatibility WD Red Plus drives with NASware technology takes the guesswork out of selecting a drive. Optimized for NAS systems, our unique algorithm balances performance and reliability in NAS and RAID environments. Simply put, a WD Red Plus drive is one of the most compatible drives available for NAS enclosures. But don't take our word for it. WD Red Plus drives are a reflection of extensive NAS partner technology engagement and compatibility-testing. WD Red Pro for Big Business If you're looking for heavy duty performance for NAS, WD Red Pro drives deliver exceptional performance for the medium to large business customer with extreme demands.
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	February 01, 2022

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WD Red Plus 3TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 128MB Cache, 3.5 Inch - WD30EFZX

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Item#: 9SIA1K6GT02529

Meet Your Seller

WD Red Plus 3TB NAS Hard Disk Drive - 5400 RPM Class SATA 6Gb/s, CMR, 128MB Cache, 3.5 Inch - WD30EFZX

Learn more about the Western Digital WD30EFZX

Customer Reviews of the Western Digital WD30EFZX

Warranty & Returns

Warranty, Returns, And Additional Information

Warranty

Return Policies

Manufacturer Contact Info