Configuring RAID on Dell Technologies servers (especially Dell PowerEdge systems) is usually done through the RAID controller utility (PERC – PowerEdge RAID Controller). Here’s a clear step-by-step guide you can follow:

🔧 Method 1: Using BIOS / PERC Configuration Utility (Pre-boot)

Step 1: Enter RAID Controller Setup

• Power on or reboot the server
• When prompted, press:
  • Ctrl + R (for PERC controllers)

Step 2: Open Virtual Disk Management

• Once inside the RAID BIOS utility
• You’ll see available physical disks
• Select “Create New Virtual Disk”

Step 3: Choose RAID Level

Pick based on your needs:

• RAID 0 → High performance, no redundancy
• RAID 1 → Mirroring (2 disks)
• RAID 5 → Good balance (min 3 disks)
• RAID 6 → Double parity (min 4 disks)
• RAID 10 → High performance + redundancy (min 4 disks)

Step 4: Select Physical Disks

• Highlight disks you want in the array
• Move them to the selected list

Step 5: Configure Settings

• Stripe size (default is usually fine)
• Read/Write policy:
  • Write Back (better performance, needs battery)
• Disk cache policy

Step 6: Initialize RAID

• Choose:
  • Fast Initialization (quick setup)
  • Full Initialization (recommended for production)

Step 7: Save Configuration

• Confirm and exit
• RAID virtual disk will now be created

💻 Method 2: Using Lifecycle Controller (Recommended for Beginners)

Dell provides an easier UI via Lifecycle Controller:

Steps:

1. Press F10 during boot
2. Enter Lifecycle Controller
3. Go to:
   • Storage Configuration
4. Select:
   • Create Virtual Disk
5. Choose:
   • RAID level
   • Physical disks
6. Apply settings and finish

🖥️ Method 3: Using OS Tools (After Boot)

If OS is already installed:

• Install Dell OpenManage Server Administrator (OMSA)

• Access via browser:

  https://<server-ip>:1311
  

• Navigate to:
  • Storage → PERC controller → Create Virtual Disk

⚙️ Best Practices

• Use RAID 1 or RAID 10 for OS drives
• Use RAID 5/6 for storage efficiency
• Always enable Write Back cache with battery-backed controller
• Keep a hot spare disk configured
• Update RAID controller firmware regularly

⚠️ Important Notes

• Creating RAID erases all data on selected disks
• Always backup before reconfiguring
• Ensure disks are identical (size/speed) for best performance