Myst, both Seagate and WD have tools you can download to test their drives. Any generic tool will also do the trick, but the vendor specific ones may give you additional diagnostic modes or messages when matched to the same brand drive.
Seagate own Maxtor so Seatools appears to support that brand. I recommend you burn the DOS version to a CD, the Windows version may not be able to access the controllers/drives directly. You'll need to have the drive installed on a native SATA port.
http://www.seagate.com/www/en-us/sup...oads/seatools/