I'm hearing a clicking noise, as if it is trying to switch gears but not catching. I originally got a B-Tree node error, saw the falshing question mark, attempted Data Rescue, but have not had any luck retreiving data. I have two hard drives, master & slave, and Data Rescue sees Slave HD 2, but not HD 1 with application and important data. Does clicking noise mean HD is shot? Or can I reinstall operating system on HD 2 and try to retrieve data from HD 1? I am taking both HD's out and reinstalling them, seeing if it is a bad connection before I go on. any suggestions?