Seagate is very proud of the Barracuda ES.2 line, so we thought we'd Seagate Barracuda ES.2 1TB SATA HDD (Model # STNS). SATA 3Gb/s, SATA Gb/s and SAS 3Gb/s. Key Advantages. •. 1-TB drive delivers 33 percent more capacity than the boost over SATA. STNS. Seagate Barracuda ES STNS 1 TB " Internal Hard Drive - SATA The Barracuda ES.2 drive is the perfect solution for high-capacity enterprise.