On Mon, 1 Jun 2020 10:10:41 -0400
Jonathan Billings <billi...@negate.org> wrote:

> If you see in the Fedora entry, it has:
> HD(3,GPT,a5c3bc11-e83b-48d0-be96-783af37228f1,0x2001800\
> ,0xfa000)/File(\EFI\FEDORA\GRUBX64.EFI)
> 
> That means to look for a volume with the 3rd GPT partition, with the
> UUID of a5c3bc11-e83b-48d0-be96-783af37228f1 (and some other data).
> On that disk, look for the /EFI/FEDORA/GRUBX64.EFI executable
> (remember, this is a DOS filesystem so it's case-insensitive).
> 
> Run 'blkid' on a running system, and you'll see that the PARTUUID of
> the EFI volume matches the UUID in the above EFI entry.
> 
> You can have an EFI volume on multiple disks.  EFI also supports
> things like network boot, which has a different syntax EFI entry.  The
> efibootmgr command does a lot of the hard work of figuring that out
> for you, so you don't need to manually enter that information.
> 
You seem knowledgeable, so I'll ask you.  How does the efi firmware
decide which /boot/efi to use as the source when the computer is
started?  Does it have to be selected from the efi firmware menu at
each boot?
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