Sometimes when I start up my computer the harddrive makes a banging sound and it wont go past the "detecting drives" or whatever it is on post untill the banging sound stops. I dont think I've lost any info and my system is still stable, but I dont think that is a good sound. Its never done this before untill a couple of days ago. Anyways to stop it? Its a Seagate 80gig w/ a 8meg buffer and 7200 rpms. Any help would be great. Thanks.