Any other mac users experience this? I have an external WD HD on my Mac. One partition is Time Machine, and another is just external storage. Whenever I boot up my Mac (and sometimes when I'm just trying to do something on my Mac), the external drive runs and the system beach-balls until the external drive finishes making read/write noise. It's as if it's trying to go to the external drive for system-level stuff, and that blocks all other operations. #macproblems