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Re: Trouble making bootable USB from ISO image




Nicolas George wrote:

> That is absolutely not true. Partition data, UEFI or not, bootable or
> not, are just octets on a medium. They could be created with an Atari if
> Atari had USB plugs, that would not make any difference.
> 
> The vague truth behind your statement is:
> 
> To edit UEFI variables, the computer need to have booted in UEFI mode.
> 
> The UEFI variables, the contents of the computer's non-volatile internal
> memory. Not the contents of the drive. They contain, amongst other
> things, the default boot options. They are not used when selecting the
> boot option manually.

Yes, this is what I wanted to say - you are right. You can create the
partition with fdisk or alike, but grub refuses to install if it is not
booted in UEFI