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 up **two different RAID 0+1 (RAID 10) arrays** inside the same unit. Let’s break this down:

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### ✅ First, the Basics

* The EX4100 has **4 bays**.

* **RAID 10 (aka RAID 1+0)** requires at least **4 drives**, because it mirrors and stripes across pairs.

* With only **4 drives total**, the EX4100 can only support **one RAID 10 array** across all 4 drives.

* To create **two separate RAID 10 arrays**, you would need **at least 8 drives** (2 arrays × 4 drives each).

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### ⚠️ Limitation in Your Case

On the EX4100 (4-bay model):

* You cannot split 4 drives into **two RAID 10 arrays**.

* The system firmware only allows **one RAID mode per volume**, and RAID 10 uses all 4 bays.

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### 🔄 Alternative Options

If your goal is to **separate data but still use redundancy**, here are some possible setups:

1. **Two RAID 1 arrays (Mirror Pairs)**

* Put drives **1+2 in RAID 1**

* Put drives **3+4 in RAID 1**

* This gives you **two mirrored volumes**, each redundant.

* Similar concept to having two RAID 10 arrays, but without striping.

2. **One RAID 10 + External Storage**

* Use all 4 drives in **RAID 10** (best balance of speed + redundancy).

* Attach an **external USB drive** or another NAS for a separate volume.

3. **JBOD or Multiple Volumes**

* You could configure the EX4100 as **JBOD (Just a Bunch of Disks)** and create software-level arrays on a computer.

* But this removes the convenience of NAS-managed RAID.

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### 📌 Recommendation

If you absolutely need **two RAID 10 arrays**, you’d have to move up to a bigger NAS (like **My Cloud Pro PR4100 with expansion** or a Synology/QNAP 8-bay system).

On your current EX4100 (4 bays), the closest option is **two RAID 1 arrays**.

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👉 Do you want me to give you a **step-by-step guide on setting up two RAID 1 volumes** on your EX4100, since that’s the closest you can get to two RAID 10s?