Hard Drive Operating Temperature 5 ~ 60°C (41 ~ 140°F) Warranty 5 years 24X7 Operation YES MTBF (hours)/Load/Upload Cycles 6000000 Dimensions (W x H x D) 101.6 x 26.1 x 147 mm / 4 x 1.028 x 5.787 in. Spindle Speed 7200 RPM Size 3.5" Manufacturer Western Digital Interface SATA III Capacity 1 TB Cache Size 128 MB Average Read Seek Time 7.7 ms