WD 4 TB WD Purple SATA III Intellipower 64 MB Cache Bulk/OEM AV Hard Drive 4 sata_6_0_gb 64 MB Cache 3.5-Inch Internal Bare or OEM Drives WD40PURX

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WD Purple 4 TB Surveillance Storage.
WD Purple Surveillance Storage is built for 24/7, always-on, high-definition surveillance security systems that use up to eight hard drives and up to 32 cameras.

Improve performance with AllFrame.
WD Purple surveillance-class hard drives are equipped with AllFrame technology which works with ATA streaming to reduce frame loss, improve playback and increases the number of drive bays supported. AllFrame reduces video interruptions that commonly occur when desktop hard drives are incorrectly used as storage in security systems. Missed frames and lost footage is a serious problem when an event occurs and surveillance footage needs to be retrieved. WD Purple with AllFrame provides the confidence you should expect when it's time to play back and review critical surveillance footage.

Key benefits: 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 TLER & ATA streaming support Supports up to eight drives

Engineered for compatibility – WD Purple surveillance hard drives are built for compatibility with industry-leading chassis and chip set manufacturers for seamless integration into your new or existing video surveillance system. Check out our compatibility selector to find out what surveillance drive is right for you.
Optimized performance for up to 32 HD cameras – WD Purple hard drives are optimized to support up to 32 high-definition surveillance cameras, giving you the flexibility to upgrade and expand your security system in the future.
Lower power consumption – Low power consumption is crucial in high-temperature always-on surveillance environments. With exclusive IntelliSeek technology, WD Purple drives calculate the optimum seek speeds which lowers power consumption, noise and vibration that can damage and cause desktop drives to wear out more quickly. When you invest in a premium surveillance-class drive you worry less while enjoying the benefits over a longer period of time.
Ideal for: Security systems that want 24/7 surveillance reliability Surveillance security systems using PVR, DVR, NVR recorders. Security applications that require reduce error pixilation and video interruptions Surveillance-class storage performance that use up to eight hard drives and up to 32 cameras.

Features at a glance Built for 24/7 surveillance environments AllFrame technology for better performance Designed to support up to 32 HD cameras Engineered for compatibility

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Surveillance Storage
Comparison ChartWD PurpleWD SeWD Re Built for personal, home office or small business surveillance systems using up to 32 cameras. Optimal for small and medium business and enterprise surveillance systems, using up to 64 cameras. Designed for medium to large business and enterprise surveillance systems, including mission critical applications, using unlimited cameras. Capacity 3.5-inch – 1 TB up to 4 TB 3.5-inch – 1 TB up to 4 TB 3.5-inch – 250 GB up to 4 TB Ideal For Home / SOHO / SMB SOHO / SMB / SME SME / Large Enterprise Mission Critical No No Yes Surveillance Bays Supported 1-8 Surveillance Bays 6+ Surveillance Bays 6+ Surveillance Bays Chassis Type Supported Table-top Table-top, Rack-mount Table-top, Rack-mount Number of Cameras 1 to 32 1 to 64 Unlimited Interface SATA SATA SATA or SAS Firmware AllFrame Technology Enterprise-class Firmware Enterprise-class Firmware