I've learned in a thread in the notebook section that you can boot current Macs from FireWire 800 drives. Now, I just ordered an OWC dual drive enclosure, which I intend to use in a RAID1 setup for backups (using my trustworthy bakcup/cloning buddy SuperDuper!). But I've just started wondering about something... Does anyone here use an external drive as their boot volume? I ask this, because I intend to buy two 1TB drives for the OWC enclosure, and the drive in my iMac is only 500GB. So I started wondering if it wouldn't be better to turn my initial plan upside down and use the external RAID1 setup as my boot volume, and use my internal drive for backups. Does this make any sense at all? What are the disadvantages (besides power consumption)? And what, if any, are the advantages? My current (300GB) backup drive will move on and become either my Time Machine backup drive (never used it, as I have SuperDuper!, but the idea of continuous backups is appealing, I must say), or a second backup drive for only the essential data, which I can store at work so the risk of losing data is minimized. Any ideas about that? What's better? Man, all these options are affecting* my decisive capabilities... *) Is this a correct use of the word?