Differences Between DVD/CD Boot and USB Boot

[mech-eng]

What are the differences between USB Boot and CD/DVD Boot. I am confused when booting from USB. My BİOS setting is set up for Legacy Mode and USB Boot but now something is different from CD/DVD boot. In DVD boot we restart PC it gives a notification at the start as push a key. Without logging in we can do the installation. But in USB case, I don't take any notification. After loggin in, under my computer I access to the setup file in the USB. The I start installation. Is this normal? Should it have been like in the case of DVD boot i.e not logging in?

 

[jedishrfu]

The difference is that its giving you chance to insert a DVD or CD before actually trying to boot from the device. In the case of the USB, it can detect its presence and consequently boot from it. The USB acts in many ways like a HDD.

https://lifehacker.com/5991848/how-to-boot-from-a-cd-or-usb-drive-on-any-pc