If you're not familiar with the Linux disk device naming scheme, you won't get much use out of it, though. You could guess at the name of your device based on size and partition layout, however, if you choose incorrectly, you could make the machine's owner very angry...
If you can boot from CD or USB, there's the excellent GParted Live CD.
http://gparted.sourceforge.net/livecd.php
If you're not familiar with the Linux disk device naming scheme, you won't get much use out of it, though. You could guess at the name of your device based on size and partition layout, however, if you choose incorrectly, you could make the machine's owner very angry...
Vintage!
anything about this, if it's any good or what, but you might check this out
http://freshmeat.net/projects/partlogic/