Total hot mess PC problem I caused. Please help!

[teoff]

So I found that J: which shows up in My Computer, had 931GB of space. I would assume this is the drive?

Opening the file says it requires a format. I looked it up in Disk Manager and saw that it listed itself as 931GB, RAW, so I formatted it in NTFS. It took forever, like I left it on over night and it was still going, and then I received an error within the 70% range. I tried to format J: directly from My Computer and the green bar filled up to, I would say, in the 70%s before it gave me an error again after going overnight again.

And this is what Disk Manager shows now.
http://i53.tinypic.com/icllps.jpg

It no longer lists itself as RAW or the J: directory which it did before. I'm really not sure what to do from this point, so I'm coming here. What could be wrong with the hard drive?