Hello, I have been a mac user since 2001 and havent had any apple hardware problems until I bought my blk macbook Dec 2006. I have had two harddrives crash on me since I bought it which has been nerve wracking. (I had most of the stuff backed up but its still very frustrating) My First harddrive went out and apple replaced it cause it was under warranty, second one wasnt so I replaced it myself with a little help from a tech savvy friend. My Question is right before my harddrive fried last time it was making an irregular chirping sound and now my new one is doing it. My computer has been getting very hot lately and as a freelance designer I am very very frustrated with this computer cause I am always worried it is going to crash and get in the way of the work I need to get done for clients. Is the chirping and mechanical sound a warning sign my harddrive might go out again? any suggestions on what I should do? Im very frustrated and just dont want to have to worry about my harddrive frying every time I am trying to finish a project. thanks for any advice you can offer.