>you get about 4W savings all the time, ie. 20W for the full array. It would either be ~2W or ~7W. Relevant to bear in mind the TB 2.5inch drives have more pla

>you get about 4W savings all the time, ie. 20W for the full array. It would either be ~2W or ~7W. Relevant to bear in mind the TB 2.5inch drives have more platters than standard height 2.5" so will use more power. 5x2.5" Drives = 2.9W 1x4TB Drives = 5W 2x3TB Drives = 10W You think 'i need X TB', not 'i need X drives'.