MDD (MDD12TSATA25672E) 12TB 7200 RPM 256MB Cache SATA 6.0Gb/s 3.5″ Internal Enterprise Hard Drive – 5 Years Warranty HIGHEST-RELIABILITY – The industrys highest-reliability 7200-RPM drive, designed for 247 operation with MTBF of 2.0M hours and AFR of 0.44%.