I have an external hard drive connected by firewire (6 pin). I'm new to a mac so there are still some things I do not understand. In windows you can stop an external device like a hard drive. It will lock the heads and everything. How do I acomplish this in os x? What are the steps I need to follow before unplugging and/or turning off the power to the external hard drive? I would apprecaite any help I could get. Thank you.