Le 03/03/2022 à 02:10, David Chmelik a écrit :

I'd never installed GRUB to a USB flash drive.

It is the same as installing GRUB to a regular disk.

When I tried to load modules part_dfly, ufs2, GRUB said they weren't found.

Did you check in the location where they are supposed to be, and the value of $prefix which should point to it ?

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