I'm mostly confused about how to set this up right. I haven't done a system with raid.
I will have a system drive, shared with windows, and changing 3 hdd for manjaro only. I would like to make an even 4 but that can't happen for now. This leaves me with choosing raid 5 which from what I found is simple enough with BTRFS and could be changed later (I've made my mind on raid 5 for what I have, I see arguments about it).
After installing, how would I go about having the 3 encrypted drives raid 5 together for system boot? If set with the same encryption password as the system will it still ask for a password for the raid? For each drive? How is a raid like this added to fstab? Is expanding to 4 drives going to be too weird with the encryption?