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Re: repair broken boot record

From: Thomas Danckaert
Subject: Re: repair broken boot record
Date: Wed, 06 Oct 2021 10:23:38 +0200
User-agent: Roundcube Webmail/1.4.2

On 2021-10-05 13:04, pelzflorian (Florian Pelz) wrote:
On Tue, Oct 05, 2021 at 11:28:50AM +0200, Thomas Danckaert wrote:
In one of the final
steps, where guix tries to install the bootloader, I get the error:

/gnu/store/.../grub/i386-pc/ doesn't exist. Please specify
--target or --directory.

This is strange.  When you reconfigure, Guix should print the
grub-install command that was used, which should include both --target
and --directory.

The full message is:

guix system: error: '/gnu/store/v77n5m....grub-efi-2.06/sbin/grub-install --boot-directory //boot --bootloader-id=Guix --efi-directory=/boot/efi' exited with status 1; output follows:

/gnu/store/.../grub-install: error: /gnu/store/.../lib/grub/i386-pc/ doesn't exist. Please specify --target or --directory'

Note that the grub-install command doens't contain '--target' or '--directory'. (Also: my system is x64, and this seems to be for i386. Should there be a --target=x64_86-efi somewhere?)

However, perhaps the chroot is at fault: Before chrooting to, let’s
say, /mnt with chroot /mnt, you need to have mounted the /dev/sdXy
file system with EFI on it (that which is declared in your config.scm)
to /mnt/boot/efi.

I have in my config 'target /boot/efi'. My EFI partition is /dev/sda1. If I mount it like
# mount /dev/sda1 /mnt2
(/mnt2 because I already have my /dev/sda3 partition with guix at /mnt)
I find the following layout:


what would be the correct bind mount?  I tried
# mount --bind /mnt2/EFI /boot/efi
so I now have

Any idea if that is the desired layout?



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