On Wed, May 12, 2010 at 3:00 PM, Mick <michaelkintz...@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.ange...@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.
