Re: [PATCH] use UUID to map system devices to grub devices

[Robert Millan <rmh@aybabtu.com>]

On Fri, Jul 31, 2009 at 06:26:51PM +0200, Felix Zielcke wrote:
> 
> If we'd do an arbitrary mapping then `grub-probe -t drive' would show
> the wrong grub device.
> But except from this I think that would be okay.

We can never garantee that `grub-probe -t drive' will show the "right" drive,
at least on i386-pc, because we don't know how is BIOS going to order them.

Maybe Linux order depends on a race, and is different every time!  This
actually happens with some devices.

So the best we can do is to avoid reliing on it entirely, by using UUIDs in
the upper layer.  We don't need to use UUIDs here, because they're already
being used to find the right filesystem when we boot.

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."