ST9300653SS H8DVC Seagate 300GB 15K 2.5″ 6Gbps SAS HARD DRIVE. eagate ST9300653SS is a 300GB Savvio® 15K.3 hard drive that stores twice the amount of Tier 1 data over previous generation, without increasing drive count, in 2.5-inch form factor. It enables faster transaction processing, which can result in increased revenue generation and improved customer satisfaction.