I have a PowerMac G4 with mirrored drive doors and just realized that my HDD (i think) is making these wierd scratchy squeaking noises. it might be my fan making them but im not 100% sure. anyone have these problems? im hoping that this doesnt mean the HDD is about to kick the bucket. should i get a new HDD and ditch the old one? How would i go about swapping hard drives? I know there are issues with getting the new one to boot the comp n such. Any help would be great.