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List:       grub-help
Subject:    Re: Grub-install fails with grub-install: error: disk `md0' not found.
From:       Mark Syms <mark () marksyms ! me ! uk>
Date:       2018-04-01 14:30:43
Message-ID: CA+Ty-0tCcXU=U7Q8TU0NkXPTSVXTCkmXZheUPgo3GgWpCqe8dA () mail ! gmail ! com
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Indeed, I have no idea how it got lost, lvm2 disappeared as well so the
system then failed to reboot. Busy fixing that with a rescue disk at the
moment. All I can assume is they got somehow marked as auto-installed and
whatever auto installed them was removed and the cleanup purged them.

Mark.

On Sun, 1 Apr 2018 at 14:39 Pascal Hambourg <pascal@plouf.fr.eu.org> wrote:

> Le 01/04/2018 à 14:37, Mark Syms a écrit :
> > Fixed if myself.
> >
> > Turns out that an earlier package run (some two weeks ago) had removed
> > mdadm and I hadn't spotted that. So when grub-install tried to
> > interrogate the raid it didn't have any user space tools to do so.
>
> It is one of the rare causes I found when searching the web for the
> error message, although it sounded quite unlikely. Why the hell would
> such an essential component as mdadm be uninstalled ? It could have
> broken your system boot more surely than GRUB itself. Assembly of 1.x
> arrays requires mdadm.
>
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