Change in loader or kernel: won't boot with kfreebsd in grub2

[Juergen Lock]

On Sun, Aug 25, 2013 at 03:35:06PM -0700, Thomas Mueller wrote:
> > On Sat, Aug 24, 2013 at 08:53:31PM -0700, Thomas Mueller wrote:
> > > Some updates:
> 
> > > I could see what happens if I try to boot the FreeBSD boot partition on the hard drive using the Super Grub Disk with chainloader.
> 
> > > If that works, it would boot FreeBSD 9.0-BETA1, but I would see if it works.
> 
> > > That failed (invalid signature).
> 
> > You probably need to chainload a freebsd-boot partition, _if_ you
> > want to chainload at all.
> 
> I was trying to chainload the freebsd-boot partition!  But grub2 didn't like it.
> 
Hmm I guess it doesn't know about that partition type yet then...

> > > I could also try
> > > kfreebsd /boot/kernel/kernel
> 
> > > That failed to boot the proper partition, went to the debugger (db>), whereupon all I could type was "reboot".
> 
> >  You didn't get a mountroot prompt?  If you did you can try typing a
> > question mark and return, that should list possible partitions to mount
> > root from.  If you didn't, or you don't want to do this manually you
> > need to set kFreeBSD.vfs.root.mountfrom=ufs:/dev/ada0p1 from grub2,
> > or wherever your root partition is.
> 
> I remember pressing a key, but then the system rushed past the mountroot prompt into the debugger prompt.
> 
 If you pressed return w/o typing anything I guess that's what will happen...

> > > Now can I safely install boot into the partition to be booted, as I did with NetBSD on USB stick?
> 
> > > gpart -p /boot/boot -i 3
> 
> > > That would be for /dev/ada0p3, but I am afraid of damaging something.
> 
> >  That would need to be on a freebsd-boot partition, and you want
> > /boot/gptboot not /boot/boot.
> 
> I believe bsdlabel can be used to install boot code to a partition, but believe that is not for GPT.

 Indeed.

>  I could try bsdlabel on a giant floppy image as I used installboot on a giant floppy image for NetBSD.
> 
 Uhm, why not just get grub2 kfreebsd booting working?

 Best,
	Juergen