I have a 500 GB external HD. One fine day, it became RAW (it had started showing signs of wearing, my bad - I didn't backup my files then).
I happen to read a similar issue in this forum (http://www.bleepingcomputer.com/forums/t/481048/external-drive-showing-raw-data-after-removal-without-ejecting/) and ended up buying Parted Magic.
>> I successfully booted into it and mounted my bad HD.
>> I was able to see all my files after mounting and was extremely happy.
>> I selected all the files and started copying it into my another HD.
>> It all went fine for 20 seconds and then I get the error message "Error splicing file: Input/output error" for all the files.
>> Now when I go back to the bad HD, I can see all the main folders intact but none of it has any files.
>> If I unplug and plug my HD back and then mount it again, I can see all those files. If I start copying any file again, I get the same issue.
Kindly help me out on this.