From owner-freebsd-hackers  Thu Aug 31 16:35:54 2000
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Date: Thu, 31 Aug 2000 19:31:18 -0400
From: Sergey Babkin <babkin@bellatlantic.net>
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To: Robert Nordier <rnordier@nordier.com>
Cc: "Gary T. Corcoran" <garycor@home.com>,
	freebsd-hackers@FreeBSD.ORG
Subject: Re: Booting Linux with FreeBSD booter (hack needed)
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Robert Nordier wrote:
> 
> Gary T. Corcoran wrote:
> 
> > Now since the MBR booter "knows" that you don't boot DOS/Windows
> > from an "extended" partition (type 5), it doesn't offer it as
> > a boot choice.  Now I could probably hack the booter (boot0 ?)
> > to accept type 5 as a valid choice.  But before I risk losing
> > my whole (work) disk by messing with the MBR :), does anyone know if
> > I do this, and install LILO (the linux loader) into my "extended"
> > partition, will the MBR booter find the LILO booter to really
> > be able to boot Linux?  Or will the "extended dos" partition
> > still confuse the MBR booter - that is, not find LILO where it
> > expects it?
> 
> Unfortunately any hack based around allowing selection of type 5
> partitions won't work.  There's really no simple fix to get boot0
> booting stuff from within extended partitions.

What about installing the FreeBSD MBR into the boot sector of
the extended partition and calling it recursively ? That would
require some changes to the MBR: it should be able to receive
somehow the knowledge that it's loaded from an extended partition
and the exact geometry of that partition.

No, I'm not volunteering :-)

-SB


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