i've been wondering about this for some time now. i switched over from pcs to mac almost 3.5 years ago, but never thought about this until more recently. is there apoint to having a lot of partitions in os x? or should i just seperate info in directories instead? i know for pcs, it was good to have partitions to reduce defrag times. and i also know it's good to have a separate partition for your os, in case anything goes wrong. but for data, like music, photos, etc., should you separate by partitions? is there any advantage/disadvantage on this? i use big drives. one 160 gb and one 200 gb.