I have a brand new 2010 MP with the stock 1T WD Caviar Black (32M Cache) in Bay 1 and a 1 T WD Caviar Black (64M Cache) in Bay 2. I have TM "backing up" the primary drive. After a period of nonuse, I swear I hear the 2nd drive spinning up, when I go to use the MP, even though I have all the Energy settings set to no sleep the drives. I have gone into Terminal and issues the pmset -g command and all are set to 0, except sleep and display. No errors with TM, just weird. Any thoughts?