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#21
I'm not sure you understand what I am saying.
A "bootable" device is, by definition, a device that has a self contained program installed on it that can load and run independent of any operating system outside of the bootable device. Everything you see on your screen is being run from the program code on the Bootable device (the CD/DVD).
For instance, the Minitool Partition Wizard program on "Bootable CD" is a Linux program that loads onto your computer from the CD using the Linux Boot-Loader.
It is not "compatible with" Linux - it Is Linux.
Have you done the test where you disconnect all the extra internal and external optical drives and then tried to boot one of the problem CDs?
The purpose of this test is to see if the BIOS is not able to detect the bootable media because it is busy checking too many devices at once.