I have an intel iMac (2.4 Ghz C2D) and at the beginning of the year I purchased a Drobo. I have all my data on the Drobo, and decided to move my home folder to the Drobo. I discovered I could not boot as the admin if the Drobo was not connected. I want to use Super Duper to clone my HD on an external so I can boot from it on my Macbook when I travel. My internal HD on the iMac is 320GB but only 60GB is used (applications). The home folder on the Drobo is 300GB's in size. If I partitioned a 500GB drive say one partition being the home folder and the other partition the internal drive on my iMac would I be able to boot from the external?