Date: Sun, 31 Aug 2008 12:35:55 +0200 From: "Alexey Shuvaev" <shuvaev@physik.uni-wuerzburg.de> To: freebsd-current@freebsd.org Subject: Re: Booting from gpt on i386/amd64? [SOLVED] Message-ID: <20080831103555.GA12957@wep4017.physik.uni-wuerzburg.de> In-Reply-To: <3a142e750808291416o25b6678bm2b6fa75d0f8e4714@mail.gmail.com> References: <20080829205313.GA30330@wep4017.physik.uni-wuerzburg.de> <3a142e750808291416o25b6678bm2b6fa75d0f8e4714@mail.gmail.com>
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On Fri, Aug 29, 2008 at 11:16:07PM +0200, Paul B. Mahol wrote:
> On 8/29/08, Alexey Shuvaev <shuvaev@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',
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This command writes gptboot only partially!!!
I have padded gptboot to nearest sector boundary and dd-ed it to ad6p3.
After that the system booted successfully.
As I have expected GENERIC kernel is enough.
> > but in all cases during the boot the blinking cursor moves 1 line down
> > and computer freezes here.
> >
The remaining question is what is the correct way to put gptboot to
'freebsd-boot' partition?
It seems that this functionality was in gpt(8) but is missing in
gpart(8). Any work in progress? While I am here should I look at it?
Alexey.
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