Seagate enterprise performance 10K ST2400MM0129 2.4TB 10000Rpm SAS 12.0 Gb/s 256MB enterprise hard drive. Mfr Part Number: ST2400MM0129. Capacity: 2.4TB. Spindle Speed: 10, 000 RPM Cache: 256 MB interface: SAS 12GB/s sustained transfer rate (outer to inner diameter): 270 to 117 MB/s external transfer rate: 1200 MB/s average latency: 2.9 ms