HD does nothing but spin like it should when you plug it in before turning it on. (durring testing)
Then the PC boots up and it continually reads and writes to the HD. I had noticed the noise one day and tracked it down to the drive. You can still access the data on the HD.
I will be moving the files off tomorrow. I have it unplugged right now.
This happens on two computers via eSATA. Both Win 7 x64.
I have a WD15000H1CS-00. I upgrade the firmware when I got it to version 1.034.