described on the Seagate website Incorrect jumper settings on the drive Good information. Serial ATA drivers are not properly installed Faulty or unplugged data cable Faulty or unplugged data cable http://knowledge.seagate.com/articles/en_US/FAQ/168595en Faulty hard drive Drive not enabled in the BIOS Faulty hard drive Drive is not spinning up Drive is not spinning up Drive not enabled in the BIOS Incorrect jumper settings on the drive Serial ATA drivers are not properly installed