[wplug] Trouble Getting Dual Boot to Work

Jonathan S. Billings billings at negate.org
Sun Feb 20 15:40:19 EST 2005


On Feb 20, 2005, at 1:04 PM, Greg Simkins wrote:
> I added at 60GB Maxtor Drive as drive 0 and moved the original XP 
> drive to drive 1.  I used cable select jumper positions on both 
> drives.  Then I installed Suse Linux 9.2 on the new primary drive. 
> The Suse install went reasonable well.  When the install was finished, 
> it initially failed to boot to X and the level it did boot to didn’t 
> work.  I couldn’t even issue a shutdown command.  But when I powered 
> down and restarted, Suse worked fine.  Grub shows Suse as default and 
> it recognized that I have a windows drive and it offered windows as a 
> selection – but when I select Windows, it won’t boot.  I get this 
> error:  21 : Selected disk does not exist

In my experience, Windows does not like being moved to a non primary, 
non-master position.  You might have better luck having the windows 
disk be in the primary master position.  Also, the OS might be 
expecting to be in the original position, and switching it out confused 
it.

It may be possible to make grub do some magic with grub, though, to 
convince the BIOS and windows that the other disk is actually the 
primary master.

You could have something like this in your grub.conf for the windows 
boot option:
	map (hd0) (hd1)
	map (hd1) (hd0)

This remaps the first drive (hd0) to the second drive (hd1), and vice 
versa.

I'd probably just switch the drives in the BIOS.

--
   Jonathan Billings
billings at negate.org



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