Re: SOLVED - Re: Deb10 installer can't install grub

[Dave Sherohman <dave@sherohman.org>]

On Wed, Mar 03, 2021 at 10:28:34AM -0500, Marc Auslander wrote:
> One potential gotcha.  When you boot from an mdadm file system containing
> /boot/grub, grub will not write to the file system.  In particular, it will
> not update grub/grubenv even if you have a save_env line in grub.cfg.  So if
> you use grub-reboot to specify an alternate line in grub.cfg, you need to
> reset grubenv afterwards.  I do this in a root @reboot cron job.
> 
> If you don't know what I'm talking about, you probably don't need to worry
> about this.

I don't *know* know what you're talking about, but I think I get the
gist of it.  I'm not doing anything fancy enough to have to deal with
the details of grubenv and grub-reboot, but your initial comment about
grub refusing to write to a mdadm filesystem is consistent with what I
was seeing, and it's nice to have confirmation that it actually does
work that way.

-- 
Dave Sherohman