Hi. I have a 2TB WD RE-4 GP connected to an eSATA controller. It sounds like there’s a LOT of activity going on whenever it’s idling. The funny thing is that there’s no LED light activity at all from the eSATA docking station, as it is when the disk is actually in use. So it’s not the OS doing anything. Doing something as simple as opening a folder on the drive stops the activity for a little while. When copying a lot of files to it, it sounds like it’s doing much less than when it’s idling.
I have a lot of other WD disks I use connected to eSATA, and none of them act like that.
I’ve used the Lifeguard software to check it. Unfortunately it seems I’m not able to see the S.M.A.R.T info via the controller.
SiL 3132 controller
Windows 7 x64