Czuch: Yeah, but if I understand it correctly, the hard drive is new, and thus empty, so no data will be lost ;)
The partioning software cannot know with certainty though, whether there isn't anything on the drive, or whether it's in a file system it doesn't recognize, so it just warns you about it.
(hide) If you want to greet someone in their native language try our Player's Dictionary, in the "more about languages" link under the flags. (pauloaguia) (show all tips)