i'm not sure about this becasue i don't have one.
but i would have thought the best way to find out is by looking on the HDD itself at the label on it.
it may list a serial number that you can go and check against the records at the website. (seagate can return information about a drive just from the serial number that it reads through the internet)
anyway i would have thought that would be the best way to find out. NO SOFTWARE REQUIRED.