booting from DVD image on hard drive partition

[stan]

On Wed, 28 Mar 2012 23:33:49 -0500 (CDT)
Michael Hennebry <hennebry at web.cs.ndsu.nodak.edu> wrote:

> Since /boot and / are on disk sdb, I'd like the bootloader there also.
> Frustration is bad for my brain.  Ignore my previous request on this
> subject. I know how to change the boot hard disk in my BIOS.
> What else do I need to do?

You need to install the mbr on sdb.  Then change your BIOS to make it
the first boot disk, and you will boot sdb.  

> Is it written in TFM somewhere?

F15 still uses legacy grub as default.  So, you can boot a rescue CD
and install grub to the mbr on sdb, or boot onto sda, umount sdb, and
use grub directly on the unmounted disk (I think I've seen this in the
manual). The grub documentation is an info manual, and I find using
pinfo (yum install pinfo?) best for reading these because it allows
arrow key navigation instead of emacs key navigation like info itself.
i.e. pinfo grub