I just got a new 640gb WD drive to put into an external case from rosewill. Im formatting it connected to the USB port (in windows disk management)....and it seems like its taking a long time. Its been 2 hours and its only at 52% Is that normal? Can I stop it and try something else? (also as a side note, if the drive lays on its back it rattles the case pretty bad, but when I rotate it, its fine) Maybe its the drive spin rattling????