Barracuda 7200.12 - Hard drive - 1 TB - internal - 3.5" - SATA-300-7200 rpm - buffer 1TB 7200RPM 32MB Buffer, Serial ATA II/300, 3.5inch, Seagate Barracuda 7200.12. The Barracuda 7200.12 hard drive provides a stellar combination of storage capacity The drive's Serial ATA 3Gb/second interface delivers an industry-leading sustained data rate of up to 160MB/second for fast boot. The 3.5-inch drive is also offered in capacities of 750GB and 500GB with cache options of 32MB and 16MB.