Don't waste your time or data trying it yourself.
I'll bet the site code for your drive is WU and the firmware version is 7.01. Call me psychic . . . .
It sounds like your drive has experienced a head crash. Damaged platter(s) are likely. As soon as you replace the heads (assuming you are lucky enough to get that right) the replacement heads will self-destruct as soon as they hit the rough patch.
Quite often there are MULTIPLE problems with this drive, including data corruption. They are not easy or fun for the pros to work on. Sometimes recovery isn't possible.
According to my discussions with folks at Seagate, there is no problem with these drives or this series . . . . yet we see bad ones almost every day. Go figure.
Jon