Re: Trouble making bootable USB from ISO image
- Date: Sat, 04 May 2019 18:41:18 +0200
- From: deloptes <deloptes@xxxxxxxxx>
- Subject: 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