[opensuse] executing grub2 on an external drive

I have a USB system disk that currently will not boot. I currently have the USB disk loaded on my main system and would like to run grub2 to update the boot block on the USB device. I have looked at the USB grub.cfg file and it appears to match the one on my system except for the UUID. How does one execute grub2 with a target other than my system disk. Also, what is the best way to get the UUID for the partition. I scanned the output of hwinfo and the UUID on the USB drive appears to be correct, but there must be an easier way. Thanks Don -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org