My 12" G4 has recently started making a strange little noise - every 5 seconds the hard drive makes the subtle little whirring/clicking noise it makes when working, even when it's just idling, when it's not being asked to do anything. The noise lasts about 1 second, then a 5 second pause, then the noise again.
I recently upgraded to Tiger, & it seems to me that it didn't make the noise before. Could there be some connection here?
Is this a totally benign activity, or is it time to haul out Apple Care & get something fixed/replaced?