Creating a btrfs RAID 1 array for Debian 12/13The debian installer doesn’t support creating a RAID 1 btrfs array directly, so you must do it manually. Follow the debian installer instructions to install debian with a ESP partition and BTRFS partition. For UEFI systems you don’t need the EFI partitions to be raided but for BIOS systems you will need to create a mdadm RAID array for the boot partition. I am installing the BTRFS array to nvme1 and nvme2 because my windows install is on nvme0. I installed debian to nvme1 with a single 1GB ESP …Read more →April 7, 2025