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

[Mick <michaelkintzios@gmail.com>]

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On Saturday 08 May 2010 15:16:36 claude angéloz 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  ?
> 
> Thanks
> Best regards
> Claude

I do not have either an efi machine or a gpt disk to know for sure, but 
perhaps the following two applications may be of help in creating a EFI 
binary:


* sys-boot/mbr-gpt
     Available versions:  
                ~       0.0.1 "~x86 ~amd64"
     Homepage:            http://aybabtu.com/mbr-gpt/
     Description:         An MBR that can handle BIOS-based boot on GPT.

* sys-boot/gnu-efi
     Available versions:  
                *       3.0a-r1 "ia64 x86"
                ~       3.0e "~ia64 ~x86 ~amd64"
                ~       3.0g "~amd64 ia64 ~x86"
                ~       3.0i "~amd64 ~ia64 ~x86"
     Homepage:            http://developer.intel.com/technology/efi
     Description:         Library for build EFI Applications

Instructions for installing, booting using EFI systems are here:

http://www.gentoo.org/doc/en/handbook/handbook-
ia64.xml?style=printable&part=1&chap=2

HTH
-- 
Regards,
Mick

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