chroot problem with grub

[Justin Guerin <jguerin@cso.atmel.com>]

Hi,

I've had to move my install to a new physical disk.  I made an image of my 
two partitions (/boot and /), and they restored properly.  Now, I only need 
to run grub-install to install the boot loader.  

When I boot from Knoppix, I can mount the / to /mnt/target, then mount /boot 
to /mnt/target/boot, and /proc to /mnt/target/proc, but I can't get 
grub-install to work properly.  When I chroot /mnt/target, and run grub, 
grub can't see the drives (error 21).  However, when I back out of the 
chroot, grub sees the drives just fine.

Can anyone tell me how grub accesses the bios to find out information about 
drives?  I'm not passing something through the chroot, but I have no idea 
what.  The device nodes are available in the chroot, and so is proc.  I'm 
running as root, and I know I have access to the device nodes.

Any help is appreciated.

Justin