For Use with Dahua NVRs and HDCVI DVRs Designed for 24/7 Surveillance-optimized Hard Drive Applications Firmware Optimized for Continuous Recording; 90% Write and 10% Read Engineered for Workloads up to 180 TB/year Capacity Up to 1TB, Supports 64 Cameras per Drive Low Power Consumption and Startup Current Tarnish-resistant Components to Minimize Environmental Effects