By “I want to boot off this thing” I mean that, if I have a computer with three disks, I want to run a normal-ish distro on that computer with those three disks

By “I want to boot off this thing” I mean that, if I have a computer with three disks, I want to run a normal-ish distro on that computer with those three disks possibly as /home or /var or maybe even as /. I’m sure it’s possible. I don’t think this is quite what Ceph is intended for :)