AL15SE 1.8TB Standard 512e AL15SEB18EQ Features: 2400, 1800, 1200, 900 and 600 GB Capacity (Advanced Format sector technology models) 1200, 900, 600, 300GB (512n sector technology models) Space Efficient, Power Saving 2.5-inch Form Factor 12.0 Gbit/s SAS Interface for Better Performance 10,500 rpm Performance Industry Leading Average Latency (2.86ms) 24/7 Mission Critical Workload Performance and Data Reliability 512n sector length support in all capacities for optimum legacy application compatibility Toshiba Persistent Write Cache Technology Sanitize Instant Erase (SIE) Option Specifications: Form Factor 2.5-inch Interface SAS 12.0 Gbit/s Data Transfer Speed ( Sustained ) 260.0 MiB/s Buffer Size 128 MiB Rotation Speed 10500 rpm MTTF 2 000 000 h Weight ( Max ) 230 g