Need help to reformat an external hard drive?

Hi, I wonder if this is actually doable.

I was transferring data to my hard drive, and then at one point it froze. I unplugged it and since then, it won't boot.

Well, the first time, it asked me if I wanted to reformat it. I said no. Since then though, it just won't show up. So now I want to format it and give up on my files, but I can't even seem to be able to do that either.

I have Windows Vista.
It's a Buffalo 2TB Hard Drive. The computer sees the drive. In disk manager, it appears. I tried initializing it, but it gives me a Cyclic Redundancy Check error.
I tried the chkdsk thing, it says cannot open volume for direct access.

The drive powers up and when I connect the USB cable, you can hear it turn inside a little. Then it stops. The light stays on, the computer says the "HD is functioning properly", but it won't appear as an icon anymore.

Anything I can do?
Thanks in advance.