Built-in Rotational Vibration (RV) sensors and heat prevention controls. Designed to handle high data workloads in a multi-RAID NAS environment. N300 NAS hard drive delivers advanced reliability supporting workloads of up to 180 TB per year(6) and MTTF of up to 1.2 million hours(7) to help keep your NAS system running 24/7. Designed for 24/7 operation(9) and supports workloads of up to 180 TB/yr(6). MTTF up to 1.2 million hours(7). Massive capacity and 7200 RPM speed to store and access your critical data and important documents.