I recently had problems with my WD My Passport Essential 320GB HDD. It was clicking. One of my friends suggested that writing zeros on the disk would do. So I did that. But in the middle of the process, there was a power cut. Now, the disk does not work. The motor inside is rotating, and there is enough power. The disk shows under Device Manager. But it is simply not shown as a disk drive in explorer. I run the computer on Win 7. Is there any solution? Any help is appreciated.