How to configure GRUB to boot from CD-ROM?

[Aaron Konstam]

On Sun, 2007-08-19 at 09:25 -0500, Mikkel L. Ellertson wrote:
> Adalbert Prokop wrote:
> > Mikkel L. Ellertson wrote on Sunday 19 August 2007:
> > 
> >> You may want to control when you boot off a CD - maybe even password
> >> protect that menu option in grub.
> > 
> > That's exactly my intention. :) I don't like to have CD-ROM as primary 
> > boot device on my laptop all the time. But sometimes booting a CD is very 
> > handy and I do not like fiddling within the BIOS all the time. 
> > Unfortunately my BIOS does not offer a separate boot menu where you can 
> > quickly select a boot device.
> > 
> I just had a strange thought - I don't know if it will work. There
> is a floppy image called oldbios that will allow you to boot from a
> CD on systems that do not support booting from CDs. I have only seen
> it as an .exe file that burns a floppy under DOS/Windows. But you
> could burn a floppy, use dd to copy the image to your hard drive,
> and then chainload the image when you want to boot from a CD.
> 
> For example, if you have an image file called cd_boot.img in /boot,
> and /boot is its own partition, something like:
> 
> title CD_Boot
> 	rootnoverify (hd0,0)
> 	chainload cd_boot.img
> 
> You will probably have to play with it a bit, because this is off
> the top of my head, and I am only on my second cup of coffee...

How did you manage to get the CD to be hd0?