GEOM: gpt partitions on a gmirror array possible?

Brooks Davis brooks at
Tue Nov 30 12:28:24 PST 2004

On Tue, Nov 30, 2004 at 12:15:22PM -0800, Marcel Moolenaar wrote:
> On Tue, Nov 30, 2004 at 03:37:52PM +0000, Chris Hedley wrote:
> > >
> > >I guess a change like geom_mbr.c:1.57 is in order, or a more to-the-
> > >point test for rejecting GPT on MBR or GPT on GPT.
> > 
> > Any suggestions before I start butchering the file in question?
> Removal of the following should do it without causing problems:
>                 if (gp->rank != 2 && insist == 0)
>                         break;
> In fact, this is the fix I'm considering. The strength of GEOM is
> that you can create arbitrary layering and nesting and imposing
> limitations seems counter productive. There may be an advantage to
> allow GPT on MBR or GPT on GPT even if it's disallowed under EFI.
> We already allow the use of GPT outside the context of EFI...

I think this would be a very good idea.  It's quite conceivable that we
could end up wanting to put a GPT inside a sunlabel or an Apple partition

-- Brooks

Any statement of the form "X is the one, true Y" is FALSE.
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