^ yup that should do it.
If scandisk fixes issues and says that everything should be alright, but you continue to hear thos "clicks" then there is still a problem I would say.
Identify the manufacturer of the hard drive, go to their website and download the diagnostic tools for that drive. Check the disk using this tool (usually creats a bootable floppy).
If you get an error code back, thats bad news. Get a new hard drive NOW and copy data. Check that your old drive is under warranty.