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Re: Bug#427289: more LVM stuff (Re: Bug#427289: grub-probe: error: unkno

From: Robert Millan
Subject: Re: Bug#427289: more LVM stuff (Re: Bug#427289: grub-probe: error: unknown device when / is an encrypted LVM)
Date: Mon, 4 Jun 2007 22:30:12 +0200
User-agent: Mutt/1.5.13 (2006-08-11)

On Mon, Jun 04, 2007 at 10:11:30PM +0200, Jeroen Dekkers wrote:
> At Sun, 3 Jun 2007 23:37:25 +0200,
> Robert Millan wrote:
> > Here's another report with issues about LVM.  I notice the device name is
> > different than previous ones (note: only has /dev/sda).
> The problem seems to be that grub-install is probing for things
> outside of /boot. GRUB shouldn't use anything outside of /boot to
> start.

update-grub calls grub-probe a few times, in different places.  Some of them
could be avoided, but at least these appear to be necessary:

  # Device containing our userland.  Typicaly used for root= parameter.
  GRUB_DEVICE="`grub-probe --target=device /`"

  # Filesystem for the device containing our userland.  Used for stuff like
  # choosing Hurd filesystem module.
  GRUB_FS="`grub-probe --target=fs /`"

See also for code that might scan /usr/share/ in search of
unifont.  If e.g. /usr is a separate partition, grub needs to know that
somehow to load the font later.

Robert Millan

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