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Re: [PATCH] nested partitions

From: Robert Millan
Subject: Re: [PATCH] nested partitions
Date: Mon, 3 Aug 2009 00:25:05 +0200
User-agent: Mutt/1.5.18 (2008-05-17)

On Mon, Aug 03, 2009 at 12:09:32AM +0200, Vladimir 'phcoder' Serbinenko wrote:
> >> +      grub_device_close (dev);
> >
> > I don't think we should allow chainload at all in partitions other than 
> > msdos
> > ones.  There's no existing use of this for other labels "in the wild", and 
> > we
> > shouldn't encourage it to appear IMO.
> Actually it's something which happens with GPT. Suppose you have an OS
> on your GPT which has no multiboot support. In this case you use
> gptsync to create a fake msdos partition map and boot your OS.

So gpt could be the other exception because it is backward compatible with
msdos labels (to some extent).

But please let's not make a general rule out of this.  The chainloader is
an implementation of the DOS MBR<->PBR boot protocol, which has been mimicked
by others but is still only available on msdos labels.  If someone tries it
on another partition label type, she should see an error.

Btw, does this bugfix depend on the rest of nested partition changes?

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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