I ran WD data life guard scans on my hard drive to see if the there was a problem with my drives. Everything comes up clean. I have had a lot of clicking noises coming from one of my four drives. After I ran a chdsk on all the drives it sounded like the noise went away. Then today it was back again. All scans come up clean, however I have read about the click of death and other things relating to hard drive ticks. Everything I have read sounds a little bit scary. I am not sure what to do because the drives come up clean on any scans I do. I think that one of my drives might be going bad but I don't have any proof. The clicks are not normal I think, and they were not there when I bought the hard drives. So I guess that this could be a sign of things to come. Any input?