Re: Two GRUB setup can boot one each of two installs, but not the other, why?

[Yavuz Onder]

Michael Evans wrote:
> On Thu, Dec 17, 2009 at 5:27 AM,  <address@hidden> wrote:
>   
> > Hi,
> >
> > I have a very strange GRUB problem, that got me totally stumped.
> > [my info removed for brevity]
>
> Your problem is most likely caused by an over-helpful BIOS which is
> re-mapping physical devices so that whichever device is selected as
> the 'boot' device is setup as the 0th BIOS drive.
>
> In this case for one of the two grub installs you must refer to the
> drive your Linux installs are on by some other name; very likely by
> using a custom device.map file to specify that (hd1) is actually
> /dev/whatever.
>
> Thus one drive would be installed as normal.
> The other drive would be setup (manual grub install) with a device-map file.
>
> Since the device-map file would re-define the hard drives the actual
> grub.conf file can be the same for both installs.
>
>   

Thanks, but I am not using any disk drive spec at all, but only UUIDs.

I am pretty much forced to work with UUIDs as I frequently add extra 
disks and (hdn,m) format always poses a moving target.

Can you suggest a work around with UUIDs left in picture? Where is that 
"device-map file"? Will removing it help?

I can get rid of one of the MBRs happily if the remaining one would work.