Hitachi 3tb 7200rpm drive not powering down when idle

[latiinyoungn]

Hello

I've had two of these drives for about 6 months. they never power down when idle. I figured there was something running in the background (windows 7) but I recently reinstalled windows and they still dont power down. Is there some way to check whats preventing them from powering down?

they were previously in raid 1 but I broke the raid and its the same problem.

 

[nhasian]

could be the firmware on the hard disks themselves preventing them from spinning down.