WD Purple Surveillance Hard Drive – 4 TB-WD42PURZFeatures4TB Storage Capacity3.5″ Form FactorSATA III 6 Gb/s Interface256MB Cache5400 rpmUp to 150 MB/s Sustained Data Transfers300,000 Load/Unload Cycles180TB per Year Workload RatingDesigned for 24/7 SurveillanceSupports up to 64 HD CamerasSpecificationStorage CapacityTotal: 4 TB SATA III (6 Gb/s) 3.5″ HDD (5400 rpm)Read SpeedSequential: 150 MB/sWrite SpeedSequential: 150 MB/sBuffer256 MBHDD SpecsNoise Level28.0 dB (Active) 25.0 dB (Idle)Reliability / Data IntegrityEncryptionNoneEndurance (Total Bytes Written)180 TBLoad/Unload Cycles300,000Mean Time Between Failures (MTBF)1.0 Million HoursNon-Recoverable Read Errors per Bits Read1 in 1014ElectricalPower Draw5.1 W (Active) 4.5 W (Idle) 0.4 W (Standby)EnvironmentalOperating Temperature32 to 149°F / 0 to 65°CStorage Temperature-40 to 158°F / -40 to 70°COperating Shock30 G / 2.0 msStorage Shock250 G / 2.0 msGeneralCertificationsRoHS *as per ManufacturerDimensions5.79 x 4.02 x 1.06″ / 147.07 x 102.11 x 26.92 mmWeight1.5 lb / 0.68 kgPackaging InfoPackage Weight1.515 lbBox Dimensions (LxWxH)8.8 x 7 x 2.9″QUICK LINKSWD Purple Surveillance Hard Drive – 2 TB, 64 MB, 5400 rpm – WD22PURZWD Purple™ Pro Surveillance Hard Drive – 8TB, 256 MB, 7200 rpm – WD8001PURPWD Purple Surveillance Hard Drive – 6 TB WD63PURZSeagate Surveillance 2 TB Hard DiskWD Purple Surveillance Hard Drive – 8 TB WD84PURZ
