Barracuda XT is the first SATA-600 hard disk drive to arrive the market. It is also the first 2 TB from Seagate that spins at 7,200 rpm – the other 2 TB drive from Seagate, Barracuda LP, is a "green" model spinning at 5,900 rpm. Let's see if the new SATA-600 interface will really make a difference.