[syslinux] gpt and extlinux how to get it bootable?

[Dwight Schauer]

Hi Tobias,

My sgdisk patch made it into the latest gdisk 0.6.10 release.

0.6.10 (8/22/2010)—New in this version is support for changing
partition attributes using sgdisk (via the -A/--attributes option) and
the ability to copy one disk's partition table to another disk in both
sgdisk and gdisk (via -R/--replicate in sgdisk or u on gdisk's
experts' menu). There are also a number of bug fixes, including one
for backwards interpretation of attribute values in gdisk, improper
destruction of MBR boot code when creating a hybrid MBR, and an
inaccessible -C/--recompute-chs option in sgdisk.

Dwight

On Mon, Aug 16, 2010 at 9:59 AM, Dwight Schauer <dschauer at gmail.com> wrote:
> Hi Tobias,
>
> Bit 2 of the attributes for the parition in question need to be set.
>
> I made patches to sgisk (part of sgisk) and submitted them to the
> author about a month ago, but I've gotten no response.
>
> Here is my latest patch.
> http://bogen.teegra.net/gdisk-0.6.9-sgdisk-attributes.das-r0.patch
>
> # make hda1 gpt partition 1 legacy bios bootable
> sgdisk /dev/hda --attributes=1:set:2
>
> # show attribute bits that are enabled for hda1 gpt partition 1
> sgdisk /dev/hda --attributes=1:show
>
> # disable gpt partition 1 legacy bios booting
> sgdisk /dev/hda --attributes=1:clear:2
>
> Sincerely,
> Dwight Schauer
>
> On Mon, Aug 16, 2010 at 8:32 AM, Tobias Powalowski <t.powa at gmx.de> wrote:
>> Hi
>> I just tried to implement gpt extlinux booting in my archboot project.
>> extlinux installs fine but i'm not able to boot the hd afterwards.
>> Setting partition to boot on in parted doesn't seem to have an effect in GPT
>> mode.
>> Is there any way to get it booting, i haven't found any docu about it.
>>
>> Thanks in advance
>> greetings
>> tpowa
>> --
>> Tobias Powalowski
>> Archlinux Developer & Package Maintainer (tpowa)
>> http://www.archlinux.org
>> tpowa at archlinux.org
>>