GNU bug report logs - #40997
[raid] The bootloader can only be installed to a single drive

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From: Maxim Cournoyer <maxim.cournoyer <at> gmail.com>
To: 40997 <at> debbugs.gnu.org
Subject: bug#40997: [raid] The bootloader can only be installed to a single drive
Date: Sun, 08 Aug 2021 00:25:01 -0400

[Message part 1 (text/plain, inline)]

Hello,

maxim.cournoyer <at> gmail.com writes:

> Using Guix System, the bootloader declaration doesn't currently seem to
> support being installed to multiple drives:
>
> (bootloader (bootloader-configuration
>                  (bootloader grub-bootloader)
>                  (target "/dev/sda")
>                  (terminal-outputs '(console))))
>  --8<---------------cut here---------------end--------------->8---
>
> I suggest to change it so that target can be passed a list like
>
> (bootloader (bootloader-configuration
>                  (bootloader grub-bootloader)
>                  (target '("/dev/sda" "/dev/sdb"))
>                  (terminal-outputs '(console))))
>  --8<---------------cut here---------------end--------------->8---
>
> This is useful when trying to boot a degraded RAID array.

The following patches do exactly this (target becomes the plural
targets).  I tested it on my system, disconnecting the first drive of my
RAID1 array, and could at least boot to GRUB fine (although full boot
failed due to https://issues.guix.gnu.org/40999).

Booting a VM using an image generated from the bare-bones.tmpl template
also worked fine.

[0001-gnu-bootloader-Support-multiple-targets.patch (text/x-patch, attachment)]

[0002-Migrate-to-the-new-targets-field-of-bootloader-confi.patch (text/x-patch, attachment)]

[Message part 4 (text/plain, inline)]

Thanks,

Maxim

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