Lets say you can't access the bios to change the boot order of a drive, How would you go about booting from a particular drive.
Is it possible to make every other drive 'unbootable' and thus making the remaining drive the only way for the computer to boot? Or is this scenario impossible to solve?
Edit - More about the situation
So I've had this laptop for awhile where the screen and the HDMI port of the laptop was not working. I wanted to put it to use and make it into a NAS so I flashed a copy of freenas to a USB drive using my desktop machine(using a vm) and plugged it into my laptop(no internal hard drive) and got it to work. Then i added a external hard drive to the laptop and am using it happily :)
But i wanted to check if I take the external drive out of the enclosure and add it inside my laptop, if that would work. But sadly it didn't and I'm sure it's because the laptop is trying to boot from the internal hard drive.
Thanks in advance for any advice :)