At this stage I would use the manufacturers tools to make sure your drive is installed correctly in your PC, check it's health and format it.
The SeaTools utility will check the disk for you - that will make sure it can be read correctly by the BIOS and will check the actual disk health.
Maxblast can format the disk for you once it's health has been checked.
Both can be downloaded from here
Seagate Technology - Downloads
Download SeaTools for DOS (you'll have to give a few details), burn to CD and boot from it. Run the Long Test, if it passes. great, if not you know it is faulty.
Let us know how you get on.