Re: [gentoo-user] Re: Installing Gentoo: Grub, alternate GNU/Linux system on another partition

[Mick <michaelkintzios@gmail.com>]

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On Monday 05 Dec 2011 23:33:12 Grant Edwards wrote:
> On 2011-12-05, Mick <michaelkintzios@gmail.com> wrote:
> > On Monday 05 Dec 2011 21:58:44 Grant Edwards wrote:
> >> On 2011-12-05, Michael Mol <mikemol@gmail.com> wrote:
> >> >> You can only have one primary bootloader, either grub from Gentoo or
> >> >> grub2 from Mint, it cannot be both. But it looks like that's what you
> >> >> do have. Seeing as you intend to drop Mint eventually, you must
> >> >> uninstall grub2 and all it's files from Mint.
> >> > 
> >> > Not *exactly* true.
> >> 
> >> It is for the usual definition of "primary bootloader" as the one that
> >> is loaded and run by the BIOS.
> >> 
> >> > Grub can chainload any bootloader that's visible to BIOS. At minimum,
> >> > that means you could have grub on /dev/sda
> >> 
> >> (primary bootloader)
> >> 
> >> > chainload grub on /dev/sdb
> >> 
> >> (secondary bootloader).
> >> 
> >> > I'm uncertain if it means you could chainload a bootloader stored in
> >> > the first 512 bytes of /dev/sda8, but I suspect so.
> >> 
> >> You're right, you can.  Though to get grub2 to install on a partition
> >> like /dev/sda8 instead of in the MBR you have to use the --force
> >> option or you'll get some incomprehensable error message when you try
> >> to do the 'setup' command.
> > 
> > Last time I installed Ubuntu on a machine that had a different primary
> > OS/bootloader I chose for it to be installed on the Ubuntu partition and
> > there was not problem with it.  It was GRUB2
> 
> I tried that a couple weeks ago with several different versions of
> Ubuntu and it didn't work with any of them.  The installer was
> perfectly happy letting my chose a partition as a destination, and
> there were no error messages or warnings, but it just didn't work
> after it was installed.
> 
> I had to boot the Ubuntu live CD and then install grub2 in the Ubuntu
> partition by hand using the --force option.

Hmm ... maybe they changed their scripts?  It's been some time (more than a 
year? ) since I tried it.
-- 
Regards,
Mick

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