GRUB is failing to boot. BIOS tries to boot the second hard drive first (in Legacy Mode, and the first hard drive is Windows) but this yields a no such device: cfb69400... error.
The given id does not appear in grub.cfg or in the output of blkid -o full -s UUID.
grub-install /dev/sdb reports no errors. Grub was mistakenly installed on /dev/sda during an earlier install, and booting from this disk DOES work (using UEFI), but that's not what I need.
I can't understand where this nonexistant hard drive id is coming from, if grub-install worked and grub.cfg doesn't contain it.
How should I proceed? Thanks.
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