If the drive is in the Raw state then you have somehow lost the patition that was there , you could use something like this to fix it: http://www.cgsecurity.org/wiki/TestDisk
You can try to repair the partition with "chkdsk /r" in windows go to the properties of the disk from my computer and under tools click on error checking. It may ask to run it on the next restart if it cannot unmount the drive.
I think the file system got corrupted on the HDD. First make sure...