I' m used to using various tools that are on Live CDs. So, naturally, the disk has to be bootable.
Let's assume this is a UEFI computer. Let's also assume that the normal boot drive is GPT.
First thing, I guess, is to turn off Secure Boot. That's easy enough it seems.
The next step isn't so obvious. It seems that one could either:
1) build a GPT DVD with the tools on it. So far, this goal seems elusive.
2) switch the computer from UEFI boot CSM.
So, for now, let's say that #1 is out of reach. So, we'll use #2.
And, let's say that we want to run a hard drive test program .. a *particular* one.
So, we put in the Live CD for the disk test program and boot.
Some of these as DOS-based. Some are Linux-based. etc.
OH! Now the system, being in CSM mode, doesn't see the hard drive... (is that correct?)
Where are things heading?
What are the best approaches?
I don't want to have to "build" CDs/DVDs in some complicated fashion. This isn't a hobby.
USB Flash drives either.