Booting from gpt on i386/amd64?
Paul B. Mahol
onemda at gmail.com
Fri Aug 29 21:16:08 UTC 2008
On 8/29/08, Alexey Shuvaev <shuvaev at physik.uni-wuerzburg.de> wrote:
> Hello list!
>
> I have tried to install a system with pure gpt partitioning,
> but haven't managed to boot from it.
>
> Partition table:
>
> => 34 976773101 ad6 GPT (500.1GB)
> 34 1571840 1 freebsd-ufs (804.8MB)
> 1571874 8388608 2 freebsd-swap (4.3GB)
> 9960482 1024 3 freebsd-boot (524.3KB)
> 9961506 8388608 4 freebsd-ufs (4.3GB)
> 18350114 524288 5 freebsd-ufs (268.4MB)
> 18874402 134217728 6 freebsd-ufs (68.7GB)
> 153092130 823681005 - free - (421.7GB)
>
> All necessary files are already installed (ad6p1 = /, ad6p4 = /var, and
> so on). The system is 8.0-CURRENT from 8 August (bootable usb flash).
> Computer is Core2Duo E8400 3.0 GHz, 4 Gb RAM, ICH9, 500 GB SATA.
> What have been done:
>
> gpart bootcode -b /path/to/pmbr ad6
> [Successful]
>
> gpart bootcode -p /path/to/gptboot -i 3 ad6
> gpart: /dev/ad6p3: Invalid argument
>
> I have tried to 'newfs /dev/ad6p3' and then mounting it and copying
> gptboot into 'boot' directory on ad6p3, but looking at the sources it
> seems to be wrong.
>
> Then I tried to 'dd if=gptboot of=/dev/ad6p3 bs=512',
> but in all cases during the boot the blinking cursor moves 1 line down
> and computer freezes here.
>
>
> Is it my local problem?
> What is the correct procedure of preparing gpt-only BIOS-bootable system?
>
You have all following lines (from gpart manual) in your >> custom << kernel?
options GEOM_PART_APM
options GEOM_PART_BSD
options GEOM_PART_GPT
options GEOM_PART_MBR
options GEOM_PART_PC98
options GEOM_PART_VTOC8
> Thanks,
> Alexey.
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