I am currently backing up my iMac with a OWC Mercury Elite Pro. I have two partitions in it, one for my iMac and one for my Macbook. Time Machine is set to automatically back up my iMac. What I need to know is a) can I also backup my eMac? and b) if so, how? I am currently going to upgrade to Os X Tiger and need to back up the eMac's HD using the the same external HD used to back up my iMac.