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bug#40999: GRUB prevents booting a degraded RAID1 array atop LUKS
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From: |
Maxim Cournoyer |
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Subject: |
bug#40999: GRUB prevents booting a degraded RAID1 array atop LUKS |
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Date: |
Sun, 27 Mar 2022 00:07:34 -0400 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) |
Hi,
maxim.cournoyer@gmail.com writes:
> On a system where:
>
> 1) Each disks comprising the array is fully LUKS encrypted
> 2) Each mapped disk is made part of a Btrfs RAID1 array
>
> When attempting to boot the system after pulling out (in BIOS or using
> the cable) the drive to simulate a complete disk failure, GRUB hangs,
> prompting for the LUKS password of the disappeared drive and
> (unsurprisingly) failing to open it.
>
> This prevents booting in a degraded LUKS encrypted, Btrfs RAID1 on Guix
> System.
It seems this is a problem not unknown to other (non-Btrfs) software
RAID as well, such as mdadm. There was recently a fix for it in Ubuntu
[0]. It can probably provide cues about how to go to fix it in Guix
System.
[0] https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1879980