Here I wrote a quick guide about how I solved.
Solution 2: Install RAID 1 with disks encryption Similarly with "md1" partition (the /home partition), I choose "Add GPT Partition", and than I selected format as "Ext4" and mount on "/home" Īfter that I choose "done" and I completed the installation. I selected the "md0" partition (the root partition created before) and choose "Add GPT Partition", and than I selected format as "Ext4" and mount on "/" I created another "RAID md" volume, but this time with "/home" partition (always active), selecting both "/home" partitions to create a new "md1" partition
Using the "Create software RAID (md)" option, I selected the "/" - root - disk one partition, and the "/" partition of disk two, to create a new "md0" volume (always active) I checked both disks to be "added as a boot disk" Then, using the "Custom storage layout" during the Ubuntu Server 20.04 installation: I decided to omit a "/swap" partition because I have 16 GB of RAM installed, and I use SSD drives, and this server will be just a little home NAS, so I don't need high performance.