Grub 2 and moved sytem (rant and question)

[Thierry de Coulon]

This is partly a rant (sorry, need to let this out) and partly a question.

Following the fact that it's quite difficult to get a scanner to work with 64 
bit Linux when it (unfortunately) requires a closed source 32bit driver, I've 
decided to migrate my installation to a larger partition (on the same 
computer).

I've done it as I usually do, by copying the installation from one partition 
to another, in this case / went from sda6 to sda1 and /home from sda7 to sda2 
(using cp -r -v --preserve --no-dereference). No problem.

I then edited /etc/fstab on the new root. Normaly, I would have 
edited /boot/grub/menu.lst but... we now have grub 2.

First try: no luck. Grub fails with: Alert! /dev/disk/by-uuid/<some long and 
impossible to understand stuipd uuid>

************Rant 1****************************
they say they must use uuid's because "if partition order changes one can not 
boot anymore". Well, when does partition order change without the user doing 
it? And it's easy to correct with /dev/sdx, not with uuid! And if you clone 
your disk _nothing_ works at all because _all_ uuid's change! Great! Now even 
when the partition order did not change you can't boot anymore...
**********************************************

Now, luckily, I could still boot my old installation and search for 
information as to how get grub 2 to find out about the new uuid if my root 
partition, but I found none! update-grub did not do it. Grub 2 documentation 
is as easy to read as the darkest night and they should really have created 
tools to manage it before they use it as default boot loader.

After some time searching to no avail, I made another search that solved my 
problem: uninstall grub 2, install grub legacy, edit /boot/grub/menu.lst, and 
voilà, everything works.

*************Rant 2**************************
Maybe Grub 2 has many more possibilities than Grub Legacy, for the moment and 
with the current documentation, it mostly has more problems!
*******************************************

Now to the question: does anyone know how to do with grub 2 if you move your 
system to another partition?

Thierry