How to Set Up RAID on a Bare Metal Server: Hardware vs. Software RAID (2026 Guide)

In the enterprise landscape, data integrity and uptime are non-negotiable. When deploying Bare Metal Servers, configuring RAID (Redundant Array of Independent Disks) is the most critical step in protecting your data against hardware failure while optimizing disk performance.

1. Hardware RAID vs. Software RAID: The Technical Verdict

The choice between Hardware and Software RAID depends on your specific workload, budget, and acceptable CPU overhead:

• Hardware RAID: Superior performance utilizing a dedicated onboard processor and cache. High reliability managed independently by the RAID controller.
• Software RAID: Highly cost-effective and portable. Managed directly by the OS kernel (such as Linux mdadm).

2. Selecting the Best RAID Level

• RAID 0 (Striping): Maximum performance. No redundancy; if one drive fails, all data is lost.
• RAID 1 (Mirroring): Ideal for OS drives. Data is cloned onto two disks.
• RAID 5 (Parity): Requires at least 3 disks. Balances capacity and redundancy.
• RAID 10 (1+0): The gold standard for databases running on NVMe Dedicated Servers. Combines RAID 0 speed with RAID 1 safety (minimum 4 disks).

3. Step-by-Step: Setting Up Hardware RAID (BIOS/UEFI)

1. Enter the RAID BIOS: Restart the server and press Ctrl+R, F2, or Del during boot.
2. Create a Virtual Drive: Select the physical target drives.
3. Configure RAID Level: Choose RAID 1, 5, or 10.
4. Initialize & Save: Perform a Fast Initialization and exit.

4. Step-by-Step: Setting Up Software RAID on Linux (mdadm)

Step 1: Install mdadm

bash
sudo apt update && sudo apt install mdadm -y