grub on 5.4

[Bryan Liesner]

Dick Davies wrote:
> * Uli Middelberg <uli at middelberg.de> [0447 20:47]:
> 
>>Dick Davies schrieb:
>>
>>>grub> find /boot/grub/stage1
>>>(hd0,0,a)
>>>
>>>grub> setup (hd0)
>>>Checking if "/boot/grub/stage1" exists... yes
>>>Checking if "/boot/grub/stage2" exists... yes
>>>Checking if "/boot/grub/ufs2_stage1_5" exists... yes
>>>Running "embed /boot/grub/ufs2_stage1_5 (hd0)"... failed (this is not 
>>>fatal)
>>>Running "embed /boot/grub/ufs2_stage1_5 (hd0,0,a)"... failed (this is not 
>>>fatal)
>>>Running "install /boot/grub/stage1 (hd0) /boot/grub/stage2 p 
>>>/boot/grub/menu.lst "... failed
>>>
>>>Error 29: Disk write error
>>>
>>>grub> quit
>>>
>>
>>It will work when you install grub after booting
>>from floppy disk or CD.
> 
> 
> Wow, that's a bit messed up - I need to boot off a different disk before I 
> can write to the MBR? Someone mentioned a GEOM quirk, is that what's stopping
> me doing it from within freebsd?
> 
> I wonder why boot0cfg doesn't have the same problem?
>  
> 
>>You may create a bootable grub floppy with
>>$ cd /boot/grub
>>$ dd if=stage1 of=/dev/fd0 bs=512 count=1
>>$ dd if=stage2 of=/dev/fd0 bs=512 seek=1
> 
> 
> Thanks, but if it's a freebsd thing I'll just install the MBR from one of the
> other OSes - do you know if I need our patched grub for the mbr to grok ufs2,
> or will a leenux one work?
> 

Setting the sysctl:
  kern.geom.debugflags=16

will allow you to write the bootsectors right from grub-install while 
having a live root filesystem mounted.

-- 
=============================================================
= Bryan D. Liesner            LeezSoft Communications, Inc. =
=                             A subsidiary of LeezSoft Inc. =
= bryan at kishka.net            Home of the Gipper            =
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