I did read a lot about Linux, and how bad and dangerous having a root password set up (or having a root access privileged account), but I can't find any solution to this by myself :
I configured a RAID array with mdadm (software raid), and I understand the implied security with the "unknown" root account password you have when you first install Linux (ubuntu in my case), but here is my problem :
how do I keep that unknown password to prevent any access to the root account, when unplugging one drive from the array and rebooting grants me automatic full root access ? when I do unplug one drive and restart the computer, it goes to the emergency mode in command line, saying Ctrl+D to continue, but simply hitting enter gets me in a root shell.
(My raid array is separate from the OS drive.)