I have an Aluminum iMac with a nearly full 320gb internal drive. What I need is one external drive to provide additional storage space, and a second larger drive to backup the other two via Time Machine - I hope Time Machine is capable of doing this, but I don't know if it can. Ideally, I would purchase a dual drive enclosure, a 500gb drive for additional storage, and a large 1TB drive to backup the internal drive on the iMac AND the 500gb drive. Can I do this with this particular OWC firewire enclosure? http://eshop.macsales.com/item/Other World Computing/MEFW924AL2K/ OWC doesn't mention anything about being Time Machine Compatible...Do I have anything to worry about here or are there better solutions?