Re: [gentoo-user] Boot gentoo with GTP Disk label

[Mick <michaelkintzios@gmail.com>]

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On Wednesday 12 May 2010 21:47:41 Paul Hartman wrote:
> On Wed, May 12, 2010 at 3:00 PM, Mick <michaelkintzios@gmail.com> wrote:
> > On Monday 10 May 2010 17:01:02 Paul Hartman wrote:
> >> On Sat, May 8, 2010 at 9:16 AM, claude angéloz
> >>
> >> <claude.angeloz@bluewin.ch> wrote:
> >> > Hello,
> >> >
> >> > I installed a gentoo on a very recent system  (efi support) . AT the
> >> > reception of the laptop  it was a disk label msdos, with a boot
> >> > partition w** installer ... I changed that against  a GPt disk label.
> >> > I can install without problem the gentoo , but now it doenst boot.
> >> >
> >> > I read some docs about gpt,mbr,boot principles and tried some tools
> >> >
> >> > - install the grub2 masked package and grub-install.
> >> >
> >> > - a special partion bios_grub  as 1st bootable partition.
> >> > but actually no succesful...
> >> > but in the parted i did not see this "bios_grub" as  flag...
> >> >
> >> > I found some  tips from the web , but i guess that was only valid for
> >> > a macintel system, not a normal pc  with a disk labeled gpt and an efi
> >> > support.
> >> >
> >> > I know that it is not required  an  efi partiton to boot the os with
> >> > pc/bios and gpt disk. Or is it false ?
> >> >
> >> > If anybody has an other idea. Or I must  abandon the gpt disk label ?
> >> > Is there an equivalent refitr in OS x86  ?
> >>
> >> I'm using GPT partitions and with the grub-0.97-r9 in Gentoo it has
> >> patches to boot from GPT disks. I just did normal grub install as
> >> usual and everything seems to work. I'm not using the partition label,
> >> though, but only "root (hd0,0)"
> >
> > Interesting.  Does grub install its bootloader into the MBR, or in a GPT
> > boot partition?  I am not at all familiar with this new way of booting
> > systems.
> 
> I think basically GPT is a replacement for MBR, everything basically
> works the same way otherwise. GPT has features like redunancy, removes
> limits of MBR (no primary/logical designation anymore, no 2TB limit,
> etc). I think it has a somewhat MBR-compatible layout in the first
> sector so non-GPT-aware things can still partially recognize it.

Am I right to assume that your 1st partition on the 1st disk is the GPT boot 
partition and therefore its 1st sector is what would on a conventional disk be 
the MBR?

-- 
Regards,
Mick

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