[Discuss] Grub , EFI, Partitioning…

[markw at mohawksoft.com]

> Do any of you quickly know what is needed to be modern Linux boot
> partitions?
>
> I have a /boot and a /boot/efi that Debain installed on my internal SSD
> and I would like to duplicate them on an external device. What do I need?
>
> - partition as a GPT not MBR table
>
> - format /boot with some Linux file system
>
> - format /boot/efi with vfat
>
> - copy files in
>
> - install grub
>
> …does that cover it?
>
> Last I think I tried that my BIOS didn't want to boot from it.


UEFI boot is a different bios then MBR. You need a DOS partition that
contains an EFI directory that gets mounted on /boot/efi.

In the EFI directory is two directories: BOOT and your OS, i.e. "rocky" or
something.

BOOT needs a couple files, on mine, it is BOOTX86.EFI and fbx64.efi
"rocky" needs a few files from grub, grubx64.efi, grubenv, and others.




>
>
> Thanks,
>
> -kb
>
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