Setup RAID 1 OS Disk on Ubuntu Server 22.04 LTS


OSUbuntu 22.04 LTS
Specification2 vCPU / 4 GB RAM
Boot Disk2 x 32 GB
IP AddressDHCP
UEFI/Secure BootSupported
  • All is done in Hyper-V virtual machine on Windows 11, any configuration setup is the same as baremetal installation with some name changes.
  • Using Hyper-V Generation 2 Virtual Machine to enable UEFI and Secure Boot support


Choose Try or Install Ubuntu Server

1. Select Language

Choose your desired installation language:

2. Continue Without Updating Installer

Skip updating installer to minimize installation time:

3. Keyboard Layout & Variant

Select desired keyboard layout for installation:

4. Choose Ubuntu Server for Type of Install

Choose standard Ubuntu Server, unless you know what you are doing with minimized ubuntu server

5. Edit Network

For this time, we will just use DHCP client to get IP Address. If your network doesn’t have DHCP server or you want to setup IP Address manually, select the NIC name and edit it to match your preferences:

6. Skip Proxy Address

We don’t have proxy server and not behind proxy network, so we can skip it. Unless your server is behind proxy or need to access proxy, then you should configure it:

7. Configure Ubuntu Repository Mirror

Use nearest Ubuntu Repository Mirror server to reduce latency and increase download speed:

8. Select Custom Storage Layout for Storage Configuration

Now we starting to configure our disk for OS installation, select Custom storage layout to configure it by ourself:

9. Storage Configuration for Software RAID 1

Before configuration:

9.1. md0 for Boot disk

9.1.1. Create Boot Device

  1. Select first boot disk (32 GB) from Available Devices and set Use As Boot Device

  2. Select second boot disk (32 GB) from Available Devices and set Add As Another Boot Device

  3. ESP Partition for EFI boot device (/boot/efi) will automatically created on both device (primary and backup) with recommended size of 1 GB, let’s leave it as is.
  4. Storage summary

9.1.2. Create Unformatted partition for RAID

  1. Select first boot disk -> Free space -> Add GPT Partition

  2. Set Size=blank and Format=Leave unformatted

  3. Select second boot disk -> Free space -> Add GPT Partition

  4. Set Size=blank and Format=Leave unformatted

  5. Storage summary

9.1.3. Create md0 RAID 1 Device

  1. Select Create software RAID (md)

  2. Set name to md0
  3. Choose RAID Level 1 (mirrored)
  4. Select both the 32 GB partition 2 and set as active
  5. Click Create

  6. Storage Summary

9.1.4. Create Storage Partition for md0

  1. Select md0 free space -> Add GPT Partition. Do this twice (each for different partition)

  2. First partition (boot) : Size=2G, Format=ext4, Mount=/boot

  3. Second partition (root) : Size=blank (use max size available), Format=ext4, Mount=/

  4. Storage Summary

9.2. Final Storage Partition Tree

  1. Click Done

  2. Click Continue to Confirm Destructive Action

10. Setup User Profile

  • Name : ubuntu
  • Hostname : ubuntu22
  • Username : ubuntu
  • Password : password123

11. Install OpenSSH Server

  • Check Install OpenSSH server
  • Set Import SSH identity to No
  • Enable Allow password authentication over SSH
  • We will import the SSH key and set only public key authentication later after installation completed

Select any snap application we want to use. In this case, we won’t install anything so uncheck all application:

13. Wait for Installation

  1. Wait for Installation process

  2. Reboot Now

  3. Eject/Unmount Ubuntu ISO image and press ENTER

14. Login and Verify RAID 1 Disk Partition

  • Access via SSH

  • fdisk -l

  • lsblk

  • df -hT

  • mount

  • mdadm --detail --scan /dev/md0 && mdadm --detail /dev/md0

  • cat /etc/mdadm/mdadm.conf

  • cat /proc/mdstat


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