WD10EACS Drive not Initialized because of an I/O error

I have a server but  I am using windows 7. I had this hard drive working before. Now all of a sudden it comes up in Computer Management as Disk5 Unknown Not Initialized so I right click and I hit Initialize Disk MBR style. And in about 15seconds an Error message pops up and says The request could not be performed because of an I/O device error.

Is my disk dead? I have a lot of data on it and I don’t have a backup of the drive.

It is a Western Digital  WD10EACS 1TB Caviar.

Any Help? Any tools i can try?

Check this article

I/O Error