mkrishnan
Moderator emeritus
UPDATE: I think it's the hard drive. It seems that many (if not all) 2.4ghz unibody MacBooks are experiencing this issue. It makes sense since the fan and temperature stats are normal.
Hard drive noise is such a nuisance. There are really good (in other dimensions) new hard drives that are annoyingly loud. The 500GB Seagate (3.5") I bought to back up my iMac is obnoxious.