Model Brand HGST Series Ultrastar C10K1200 Model HUC101212CSS600 (0B25168) Performance Interface SAS 6Gb/s Capacity 1.2TB Cache 64MB Average Seek Time 4.6 ms Average Write Time 5.0 ms Average Latency < 3.0 ms RPM 10000 RPM Features Features Highest capacity 10, 000 RPM drive Field-proven, reliable design Seamless extension to the C10K900 family High-performance 6Gb/s SAS for reliable data throughput Large 64MB cache buffer manages data efficiently Halogen-reduced design and industry-best power utilization for most eco-friendly 10K SFF hard drive Dimensions Form Factor 2.5" Height (maximum) 14.8 mm Width (maximum) 70.1 mm Length (maximum) 100.6 mm