Originally Posted by adrianlarsson
Is the reverse possible? For example mounting /home and /usr from one single partition?
In fact if a user tells a Linux installer that there is only one partition to mount "/" every Linux installer will mount /boot, /home, /usr, /root..... as subdirectories of "/" in a single partition. I have installed over 100 of them and never met one objection.
If you want two hard disks for the same mounting point the right tool is called RAID.