WD Purple Surveillance Hard Drive – 4 TB-WD42PURZ Features 4TB Storage Capacity 3.5″ Form Factor SATA III 6 Gb/s Interface 256MB Cache 5400 rpm Up to 150 MB/s Sustained Data Transfers 300,000 Load/Unload Cycles 180TB per Year Workload Rating Designed for 24/7 Surveillance Supports up to 64 HD Cameras Specification Storage Capacity Total: 4 TB SATA III (6 Gb/s) 3.5″ HDD (5400 rpm) Read Speed Sequential: 150 MB/s Write Speed Sequential: 150 MB/s Buffer 256 MB HDD Specs Noise Level 28.0 dB (Active) 25.0 dB (Idle) Reliability / Data Integrity Encryption None Endurance (Total Bytes Written) 180 TB Load/Unload Cycles 300,000 Mean Time Between Failures (MTBF) 1.0 Million Hours Non-Recoverable Read Errors per Bits Read 1 in 1014 Electrical Power Draw 5.1 W (Active) 4.5 W (Idle) 0.4 W (Standby) Environmental Operating Temperature 32 to 149°F / 0 to 65°C Storage Temperature -40 to 158°F / -40 to 70°C Operating Shock 30 G / 2.0 ms Storage Shock 250 G / 2.0 ms General Certifications RoHS *as per Manufacturer Dimensions 5.79 x 4.02 x 1.06″ / 147.07 x 102.11 x 26.92 mm Weight 1.5 lb / 0.68 kg Packaging Info Package Weight 1.515 lb Box Dimensions (LxWxH) 8.8 x 7 x 2.9″ QUICK LINKS WD Purple Surveillance Hard Drive – 2 TB, 64 MB, 5400 rpm – WD22PURZ WD Purple™ Pro Surveillance Hard Drive – 8TB, 256 MB, 7200 rpm – WD8001PURP WD Purple Surveillance Hard Drive – 6 TB WD63PURZ Seagate Surveillance 2 TB Hard Disk WD Purple Surveillance Hard Drive – 8 TB WD84PURZ
