Please help--constant accessing, slow response
About two months ago, I installed additional RAM into my iMac (500 mHz G3) which sped it up like a charm. Starting just yesterday, though, it seems to be constantly accessing something on the disk, which in turn causes everything on my machine to slow down (especially Adium). Looking at iPulse (which is never running--I only opened it to see what was going on), it's reading something at a mostly constant rate of 270 K/second and has been going strong like this for a while. Restarting doesn't do anything. I only have one swapfile currently saved, so it doesn't seem to be a memory problem. What is constantly accessing, and how can I stop it? Like I said, this just started yesterday but is now pretty annoying.