I have 4 bay My Cloud Ex4100 and want two difetents raid 01

Got it 👍 — you have a WD My Cloud EX4100 (4-bay NAS) and you’d like to set it up with two different RAID 1 arrays (essentially mirroring across two separate pairs of drives).

Here’s how you can do it:

🚨 Important Notes Before You Start

Backup First: Changing RAID will erase all data on the disks. Be sure to back up anything important.

Drive Pairs: You’ll need 4 drives total, paired as:

Drives 1 & 2 → RAID 1 Array A

Drives 3 & 4 → RAID 1 Array B

⚙️ Steps to Configure Two RAID 1 Arrays on EX4100

Log in to Dashboard

Open a browser → enter your NAS IP → log in to the My Cloud OS 5 Dashboard.

Go to Storage → RAID

Select the option to Configure RAID.

Choose Manual Disk Configuration

Instead of selecting a single RAID type for all 4 drives, select JBOD / Individual Volumes or Multiple Volumes.

Create Two Volumes

Set Drives 1 & 2 as one RAID 1 volume.

Set Drives 3 & 4 as another RAID 1 volume.

Apply & Rebuild

The system will erase and rebuild each array. This can take hours depending on drive size.

When finished, you’ll see two independent RAID 1 volumes available.

✅ What You Get

Two separate RAID 1 arrays, showing as Volume_1 and Volume_2 in the dashboard.

Each RAID 1 gives you redundancy (mirror copy).

You can use one for, say, personal data and the other for media/backup, or however you like.