adding freebsd boot to grub

[Jud]

On Wed, 03 Sep 2003 13:30:53 -0700, Desmond Lee <desmond.lee at shaw.ca> 
wrote:

> Hey Josh
>
> Thanks for your help. I just reinstalled freeBSD 4.8 all over again (I
> think it's cause some how it got messed up). I then typed in the
> following at the grub command line.
>
> grub> rootnoverify (hd1,0)
> grub> chainloader +1
> grub> boot
> -or- (this one's better)
> grub> root (hd1,0,a)
> grub> kernel /boot/loader
> grub> boot
>
> It's pretty much the same thing that you said, except it only works if
> you change the 1 to a zero for the (hd1, 0, a) instead of (hd1,1,a). I'm
> guessing that you can also modify the grub to have an extra option in
> there that does the commands that you specified above. All you have to
> do is modify the file the grub looks to when trying to find out what os'
> are present in the hard disks?
>
> Thanks again.

That's correct.  Find and modify (or make) the menu.lst file (that's 'lst' 
as in abbreviation for "list").  In fact, it's a very good idea to read 
Grub's online documentation, which covers this pretty thoroughly.  And 
yes, the second version is better.  There's no need for the chainloader or 
rootnoverify stuff when booting FreeBSD (again, this is covered in the 
Grub documentation).

Jud

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org
> [mailto:owner-freebsd-questions at freebsd.org] On Behalf Of Joshua Oreman
> Sent: Wednesday, September 03, 2003 12:47 PM
> To: Desmond Lee
> Cc: questions at freebsd.org
> Subject: Re: adding freebsd boot to grub
>
> On Wed, Sep 03, 2003 at 12:16:39PM -0700 or thereabouts, Desmond Lee
> wrote:
>> Hello
>>
>> I was originally running win98 and freebsd4.8 on a box with 2 hard
>> drives. 1 disk had win98 and the other had freebsd. Everything worked
>> fine. But I then installed redhat 9.0 on the first disk with win 98.
> Now
>> the Grub only knows how to boot dos and linux, but no freebsd. There
> is
>> a article about this on the freebsd page:
>> http://www.freebsd.org/doc/en_US.ISO8859-1/articles/multi-os/ch3.html.
>> This is almost the same scenario as me. However, I do not want to do a
>> complete install of all 3 operating systems. Is it possible to just
>> reinstall freebsd on my 2nd hard drive again and get grub to recognize
>> it is there?
>
> See what "DOS" and "Linux" do.
>
> If one of those actually boots FreeBSD, rename it.
>
> If not, do this at the grub> prompt (assuming your FBSD slice is (hd1,1)
> in GRUB):
> grub> rootnoverify (hd1,1)
> grub> chainloader +1
> grub> boot
> -or- (this one's better)
> grub> root (hd1,1,a)
> grub> kernel /boot/loader
> grub> boot
>
> -- Josh
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