Re: GEOM: gpt partitions on a gmirror array possible?

From: Marcel Moolenaar (marcel_at_xcllnt.net)
Date: 11/30/04

  • Next message: Brooks Davis: "Re: GEOM: gpt partitions on a gmirror array possible?" 
    Date: Tue, 30 Nov 2004 12:15:22 -0800
To: Chris Hedley <cbh-freebsd-current@groups.chrishedley.com>

    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...

    BTW: I will then probably also enforce that if there's a MBR sector
         front of the GPT table, it must be a PMBR. Use of GPT on a
         boot disk is possible by putting a GPT table inside an MBR
         slice. In a sense, I trade width for depth :-) 

    -- 
 Marcel Moolenaar	  USPA: A-39004		 marcel@xcllnt.net
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  • Next message: Brooks Davis: "Re: GEOM: gpt partitions on a gmirror array possible?"

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