Am 02.02.2024 um 01:46:06 Uhr schrieb Dmitry:

> 2. ==>BAM<== some how that binary knows the system partition.

That information is on the EFI partition, where the GRUB bootloader
binary also resides.

root@ryz:/boot/efi/EFI# cat /boot/efi/EFI/debian/grub.cfg
search.fs_uuid 5b8b669d-xyz root hd0,gpt2 #boot partition
set prefix=($root)'/grub'
configfile $prefix/grub.cfg
root@ryz:/boot/efi/EFI#

If that information is loaded, the kernel can be loaded from the boot
partition.


-- 
Gruß
Marco

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