Western Digital Purple HDD 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA III 6 Gb/s 64MB Cache 3.5 Inch - (PVR, DVR, NVR and IPTV) Heavy Duty 24 - WD40PURX

WD40PURX-64P6ZY0 Western Digital Purple HDD 4TB Surveillance Western Digital Purple HDD 4TB Surveillance Hard Disk Drive - 5400 RPM Class SATA III 6 Gb/s 64MB Cache 3.5 Inch - (PVR, DVR, NVR and IPTV) Heavy Duty 24 - WD40PURX

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Reduces video frame loss with surveillance-class storage. Specifically tuned for surveillance security systems. Caching algorithms are tuned for write-intensive, low bit rate, high stream count applications that are typical of surveillance applications. Priority change for write allocations and preemptive caching policies.  Western Digital Purple HDD 4TB Surveillance Western Digital Purple HDD 4TB Surveillance