I tried to wake my powerbook today and it just holds up. The harddrive sounds like it is trying to read the same thing over and over, not a classic clicking, but a reading clikcing noise. I rebooted, gets to the gray screen with the spinning thing and hangs. I can't boot to safe mode, and if I try to boot to single user mode, it comes up but gets to a point were it kicks out "IOATAController device blocking bus." every 30 seconds. If I try to reinstall software from the cd or if I try to run disk utility it just does the same harddrive read thing and doesn't lock up, but just hangs. Any ideas.