To move Debian from a HardDisk partition to other one.

 mount /dev/hdg5 /mnt; mount /dev/hdg2 /mnt/boot/ .... and so on


 tar cvf - / | (cd ''mnt''; tar xvf -)

Change the root of the system, using chroot.

 chroot /mnt

And then modify Grub config files in order to boot from your new hdg drive. And execute install-grub

For LILO, execute lilo to save the changes in the MBR of your new /dev/hdg drive

If you had a Swap partition, be sure of having one now in your new drive.

edit /etc/fstab to mount /dev/hdg5 as your new /