DISCO HDD 6TB WD PURPLE WD64PURZ VIDEOVIGILANCIA HD 6TB WESTERN DIGITAL PURPLE SURVEILLANCE SATA 5400RPM WD64PURZ UPC Load/Unload Cycles: 300,000 Storage Capacity: Total: 6 TB SATA III (6 Gb/s) 3.5\" HDD (5400 rpm) Read Speed: Sequential: 175 MB/s Endurance (Total Bytes Written): 180 TB Buffer: 64 MB Mean Time Between Failures (MTBF): 1.0 Million Hours Noise Level: 28.0 dB (Active) 25.0 dB (Idle) Encryption: None Write Speed: Sequential: 175 MB/s