Western Digital WD Purple Harddisk 3.5" 4TB SATA3 6Gb/s IntelliPower 5400RPM 64 MB HDD Surveillance WD40PURX
Brand: owow Western Digital
Color: Purple
Brand: Western Digital Model: WD40PURX
Capacity: 4TB
Spin Speed: 5400 RPM
Drive Size: 3.5"
Cache Memory: 64 MB.
Data Transfer Rate (Max): -Buffer to Host 6Gb/S , -Host to/from Drive(Sustained) 110Mb/s
Interface: SATA 3

WD Purple Surveillance Storage is built for 24/7 always-on surveillance in high-definition security systems that use up to eight hard drives and up to 32 cameras. Exclusive AllFrame? technology works with ATA streaming to reduce error pixilation and video interruptions that occur when desktop hard drives are incorrectly used as storage in security systems.
4TB Capacity, Intellipower 5400RPM Rotation Speed, 64MB Cache, 3 year limited warranty
3.5" Internal Hard Drive, SATA III 6.0Gb/s, Lower Power & Heavy Duty 24/7(24 hour / 7 day)
For Surveillance, set-top boxes (PVR, DVR, NVR and IPTV), media servers and media centers.
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.