I know this sounds stupid but I swear its the case... at least for me. My drives for all 3 imacs i have gone through so far were dead silent until i Partitioned them... then they made the classic stomach growl noises... I was just wondering if others with the noise problem had a partition or not... cause it seems making a partition should not effect the noise... Say I am crazy cause to me it sounds crazy but I swear the first two imacs were fine till i partitioned them... I am now afraid to partition this new one i have cause its quiet... and i do not want to go back to the store AGAIN! anyway others who have had this issue did you have a partition?