Grub drive assignments

[Randy Kelsoe]

David Niemi wrote:

>How do the drive assignments work in Grub?
>
>I have 4 hard drives in a computer:
> hda - ntfs data disk
> hdb - ntfs data disk
> sda - FC3, Grub, used LVM default installation with SELinux
> sdb - ntfs, WinXP
>
>During the install initially grub was going to be installed to hda which
>I didn't want so I unplugged the 2 drives and installed with the 2 SATA
>active.  Because of this sda is hd0 in Grub and sdb is hd1.  Once I
>plugged the other 2 drives back in Grub wouldn't boot to WinXP.
>
>At the moment I change the boot priority to sdb in the bios to boot to
>WinXP.  This is the pertinent sections of my grub.conf:
>*********************************
>title Fedora Core (2.6.9-1.667)
>        root (hd0,0)
>        kernel /vmlinuz-2.6.9-1.667 ro root=/dev/VolGroup00/LogVol00
>rhgb quiet
>        initrd /initrd-2.6.9-1.667.img
>title Other
>        rootnoverify (hd1,0)
>        chainloader +1
>*********************************
>I tried some Google searches, man grub, and fought with info grub to no
>avail. 
>
>How do I change the drive assignments to get Grub to point to the right
>drive to boot WinXP also?
>

If you have access to the /boot/grub/device.map file, take a look at 
that, editit and run grun-install /dev/(boot device).