After encrypting the HDD and enabling the keyfile,
I can't access the console anymore.
After booting and unlocking the main drive (SSD), it tries to unlock the
newly encrypted HDD with the keyfile, and...
I'm into emergency mode, and it says the root account is locked.
Of course it's locked, I didn't even have the time to input my username and
passphrase.
I guess it's better than the cyclone eye...
Chances are it's the modifications if fstab that did it (from the little I
could gather). I'll try chrooting.