Booting from Rescue media

Hello All,

-I use HP Compaq 8300 SFF as a second machine W 10 x64 Version 10.0.19041 Build 19041
running in Legacy BIOS mode, the EUFI is missing.
Checking the MR Rescue DVD was possible, booting F9 selecting SATA2 (HP forum advice).
-This method however assumes a functioning HDD.
-Question is then what happens if a disaster strikes, how do I boot directly from the MR rescue DVD when the HDD is not accessible. F10 (HP Utility) StorageUSB Floppy/CD in (Legacy Boot Sources) save the changes?
-Am I correct thinking this?

barsim2 said:

how do I boot directly from the MR rescue DVD when the HDD is not accessible.
-Am I correct thinking this?

It's in your interest to experiment with those choices shown until you know what will happen.

Don't assume anything. Find out for yourself.