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Re: Does GRUB2 use the Dos Compatibility space?

From: Robert Millan
Subject: Re: Does GRUB2 use the Dos Compatibility space?
Date: Mon, 26 Oct 2009 16:03:19 +0100
User-agent: Mutt/1.5.18 (2008-05-17)

On Thu, Oct 22, 2009 at 08:46:38AM -0700, Dr. Dov Bulka wrote:
> I know that Grub Legacy used the space following the MBR (DOS Compat Region) 
> to store the code for stage 1.5. Consequently, it was a good idea for the OS 
> to leave the first 32KB of the boot disk intact.
> Are their any new space limitations introduced by GRUB2? How much of the 
> beginning of the boot disk are dedicated to GRUB2? In other words, as an OS 
> developer, what space regions should I stay away from?

It does.  In addition, in GPT labels it takes advantage of the BIOS Boot
partition (which serves the same purpose but can allocate more space).

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."

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