Unless you have a hardware RAID controller, you will need to use a software RAID controller/volume manageryou will need to use a software RAID controller/volume manager.
Typically, mdadm
is used to create mdX
devices which can be overlaid with your filesystem of choice. For UEFI, you will need a /boot/efi
partition as usual, as well as a /boot
partition of type Ext4 to provide the physical partition for which the mdX device containing your RAID volume will be.
You can currently apply similar methods mentioned here for your installation of elementary OS. Once your mdXmdX
devices are created, start/probe them from the elementary OS live session and then select those as your root point.