Here's a potentially strange one.
I'll admit I'm relatively new to LINUX.
I couldn't get MDK9.1 to set up any users after installation but MDK10.1 installed and set up the users OK.
I logged in as a user (admin) and attempted to install Samba server. It then insisted on me inputting Disk 4.
I tried Disk 3 but it ejected it and asked for Disk 4 again.
I logged out, looged in as root and did the same only to be asked to input Disk 3.
Regards
Rob Martin