different numbers for sata-hd

[Peter Mühlbauer]

Hi,

on a computer with an IDE hard disk and an external SATA hard
disk, GRUB gives the SATA hard disk a number different number from the
one it gave during the installation process. First, menu.lst
looks like this:
...
title Ubuntu
          root (hd1,0)
          kernel /boot/vmlinuz root=/dev/sda1 
          initrd   /boot/initrd
...

then I install GRUB:
sudo grub
root (hd1,0)
setup (hd1)

then GRUB tells me that the installation was successful, but when I
start the computer, Ubuntu starts with the configuration:

        root (hd0,0)
        kernel /boot/vmlinuz root=/dev/sda1
        initrd /boot/initrd

A short note if this is really a bug or if I should go on googling
for solutions would be great.

Best regards,

Peter