Seagate Cheetah 15K - Hard drive - 450 GB - internal - 3.5" - SAS 6Gb/s - 15000 rpm - buffer: 16 MB, P/N ST3450857SS Seventh-generation Seagate Cheetah 15K.7 drive is the fastest, highest capacity and most reliable ever. Lower watts/GB ratio helps achieve reduced power and cooling costs while optimizing capacity requirements. Higher performance with fewer drives - reducing support infrastructure, physical space requirements and storage management costs. The highest reliability of any 3.5-inch drive, with increased system reliability due to the need for fewer drives.