Reinstall GRUB?

[Doctor Who]

2008/1/25 Mikkel L. Ellertson <mikkel at infinity-ltd.com>:
>
> Doctor Who wrote:
> > I recently added another hard drive to my machine.  Previously, I had
> > 2 hard drives and Fedora was installed on one along with Vista.  I
> > installed grub to Fedora''s root and used a 3rd party boot loader to
> > access Fedora and other distros.
> >
> > Now that the 3rd SATA drive is installed, Fedora's grub is messed up
> > because it's not on the drive it thinks it is (different order to
> > drives now).  How can I go about 'fixing' Fedora's grub entry and
> > re-installing grub to Fedora's root partition (not the MBR)?
> >
> > Thanks.
> >
> Probably the easiest way to to boot the rescue CD or the install
> DVD/CD in the rescue mode, and have it mount your partitions. Then
> edit your Grub configuration and run grub-install. (I am guessing
> that you can not get to the Grub prompt because Grub is looking for
> stage 1.5 in on the wrong drive.) If you are not using partition
> labels, you will also have to edit /etc/fstab.
>
> For editing, and re-installing Grub, I like to chroot to the mount
> point for the root file system. But if you are not using partition
> labels, the rescue mode will have problems mounting /boot and
> possible other partitions because the information in /etc/fstab will
> point to the wrong drive. In that case, you will end up having to
> mount at least some of the partitions by hand before you can fix things.
>
> I don't know your level of acknowledge, so ask about the steps you
> need detailed explanations of. (or search the list) The different
> steps have been covered more then once, but it isn't always easy to
> find them.
>
> Mikkel

I can boot into Fedora via grub from another Linux install.  I assume
that will make things easier (making the edits from within Fedora
itself).  Can someone outline the steps to find out what the grub (and
fstab??) entries *should* be and the best (read Fedora-way) to change
them?

Thanks.