[Malvern] Booting from an external USB drive using Grub

[Chris Eilbeck]

Does anyone have any clues how to get Grub to boot a kernel which runs
with its root on an external USB drive?  I have a small Linux
installation on the disk but it's gonna be such a faff to clone the MS
shite on the same drive onto a bigger one and reinstall Linux.  I figured
I'd just use the /boot I already have to boot the external disk, giving
me the whole of that space for a decent Linux installation.

Initrd seems to be the right way to go about this but I don't seem to be
able to copy, uncompress and mount my existing initrd image so I can
start messing around with it.

Any clues?

Chris
-- 
Chris Eilbeck
MARS Flight Crew                              http://www.mars.org.uk/
UKRA #1108 Level 2                                                UYB
Tripoli UK Member #9527                                          LSMR