Bug#925591:

[Henry Chang]

Hi Grub dev team,



I believe the bug is in

https://salsa.debian.org/grub-team/grub/-/blob/bookworm/debian/patches/efi-variable-storage-minimise-writes.patch?ref_type=heads#L632



For MD RAID, grub_util_biosdisk_get_osdev (efidir_grub_dev->disk) will return 0, and it will cause the error thereafter.

Regards,
Henry
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