Brand new Hitchi Harddrive, Everytime it is reading or writing it makes this sound. Sounds exactly like the one in this video clip but it sounds a little louder.
https://www.youtube.com/watch?v=J09pWNQPK7U&feature=related
http://i1303.photobucket.com/albums/ag148/Jonhklien1234/western1_zpslyw7ex3t.png
http://i1303.photobucket.com/albums/ag148/Jonhklien1234/hitachi1_zpsndnhk1lh.png
https://www.youtube.com/watch?v=J09pWNQPK7U&feature=related
http://i1303.photobucket.com/albums/ag148/Jonhklien1234/western1_zpslyw7ex3t.png
http://i1303.photobucket.com/albums/ag148/Jonhklien1234/hitachi1_zpsndnhk1lh.png