WD Purple Surveillance 3.5-inch Hard Drives
Built for Personal, Home Office or Small Business Surveillance Systems

Features:

The WD Advantage

WD puts our products through extensive Functional Integrity Testing (F.I.T) prior to any product launch. This testing ensures our products consistently meet the highest quality and reliability standards of the WD brand. WD also has a detailed Knowledge Base with more than 1,000 helpful articles as well as helpful software and utilities. Our customer support lines have longer operational hours to ensure you get the help you need when you need it.

* Based on a surveillance usage of <60 TB/year transferred at 25°C ambient environment with up to 16 cameras.

Specifications:

Examples of the number of photos, songs, videos and any other files that can be stored on a hard drive are provided for illustrative purposes only. Your results will vary based on file size and format, settings, features, software and other factors.

Photo: Figures represent the average number of photos taken with a 6 megapixel camera in high-resolution JPEG mode with an average file size of 3.5 MB per photo. The actual number of images will vary by camera model and compression setting.

Hours: The DV format, regardless of its mode (miniDV, DVCAM, DVC-Pro) has a data rate of approximately 25mb/s (mega-bits per second). In storage terms, this translates to approximately 3.5MB/s (Megabytes per second) or 13GB/hr (Gigabytes per hour)

Song: Music capacity is based on 4 minutes per song. MP3 capacity is based on 128 Kbps bit rate and 11:1 audio compression ratio. Uncompressed CD quality is based on 1:1 audio compression ratio.

As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, megabit per second (Mb/s) = one million bits per second, and gigabit per second (Gb/s) = one billion bits per second.

¹ Not all products may be available in all regions of the world.
² As used for storage capacity, one megabyte (MB) = one million bytes, one gigabyte (GB) = one billion bytes, and one terabyte (TB) = one trillion bytes. Total accessible capacity varies depending on operating environment. As used for buffer or cache, one megabyte (MB) = 1,048,576 bytes. As used for transfer rate or interface, megabyte per second (MB/s) = one million bytes per second, and gigabit per second (Gb/s) = one billion bits per second. Effective maximum SATA 3 Gb/s transfer rate calculated according to the Serial ATA specification published by the SATAIO organization as of the date of this specification sheet. Visit www.sata-io.org for details.
³ WD hard drive products manufactured and sold worldwide after June 8, 2011, meet or exceed Restriction of Hazardous Substances (RoHS) compliance requirements as mandated by the RoHS Directive 2011/65/EU.
⁴ Controlled unload at ambient condition
⁵ The term of the limited warranty may vary by region. Visit http://support.wd.com/warranty for details
⁶ No non-recoverable errors during operating tests or after non-operating tests.
⁷ Sound power level.

WD Surveillance Storage:

Safety and security are always a concern. Governments, corporations and even individuals must protect themselves and their assets. One of the most popular methods employed to enhance security and safety is with video – one of the most storage-intensive fi le formats around. As the affordability of high-defi nition surveillance cameras has declined and their widespread use has been adopted, the demand for reliable and scalable storage has skyrocketed. As a result - according to IHS - the market for enterprise storage solutions in security is forecasted to grow by a 14.8% compound annual growth rate (CAGR) over the next fi ve years.1 As evidenced by the data, increased presence and enhanced requirements of modern surveillance systems, there is a pressing need for specialized hard drives that offer more storage capacity and advanced features designed specifi cally for DVRs, NVRs, CCTV, IPTV and other surveillance mediums.

Surveillance storage for peace-of-mind

As a worldwide storage leader, WD strives to design drives to exceed the demanding requirements of digital video surveillance. With design, development, manufacturing and industry-leading customer support services, WD’s surveillance partners receive best-in-class products with innovative feature sets, ensuring that digital video surveillance systems equipped with WD drives are optimized for maximum performance. Whether you’re protecting your personal assets and loved ones or monitoring the business you worked hard to build, you can rely on surveillance storage built by one of the largest hard drive manufacturers in the world. WD surveillance hard drives are designed for high temperature, always-on, surveillance security systems to ensure reliability and quality video playback when you need it most.

WD gives you the security you want at the scale you need

Standard desktop hard drives are designed to operate approximately eight hours a day for five days per week. Consider now that a DVR or high-end surveillance system typically runs 24 hours per day, for seven days per week recording numerous simultaneous video streams. What’s needed for applications like these is another type of drive, a WD surveillance drive.

WD has designed a storage lineup perfect for digital video surveillance and its many unique environments and application sets. WD’s surveillance drives enable DVR, NVR, CCTV, IPTV and other digital video surveillance systems. These purpose-built drives deliver a comprehensive range of features and capabilities such as high-resolution image quality, streaming video from multiple high-definition cameras, video archiving with ultra-fast data access and on-demand video playback.

Regardless of the surveillance environment, whether it’s banking, casino, retail, commercial, residential, corporate, government or law enforcement, WD surveillance drives deliver the performance, capacity and reliability that surveillance applications require.

Understanding today’s surveillance market

The surveillance market is splitting into two primary types of systems; DVR – primarily analog systems that have cameras directly connected to the system, and NVR – digital systems that have cameras connected via IP (internet protocol). Due to the fact that DVRs have a finite number of cameras that can be physically attached, the number of streams and maximum workload on the hard drives can be determined. Since NVRs theoretically can have an unlimited number of cameras attached to the system, the number of streams, workload on the hard drive, and the system’s retention period can scale beyond that of a DVR.*

*There are limitations, primarily tied to system capability, so NVRs are not infinitely scalable.

Choosing the right surveillance-class drive

WD offers a complete line of surveillance-class storage designed for home, small to medium business or mission critical security systems. These hard drives are engineered to support the rigorous 24/7, always-on, high-definition video requirement set unique to surveillance security systems. Choose a hard drive that is designed and engineered for surveillance systems and enjoy the peace-of-mind you can only get from surveillance-class storage.

	WD Purple	WD Purple NV	WD Re
Summary	Balanced reliability, performance and cost storage.	Purpose built storage for NVR Surveillance systems.	Maximum reliability and performance storage for large business and mission critical surveillance.
Form Factor & Capacity	3.5-inch: 1 TB - 6 TB	3.5-inch: 4 TB & 6 TB	3.5-inch: 250 GB - 6 TB
Application	Mainstream Surveillance	Mid-range and Small-Med Business Surveillance	High-end and Mission Critical Surveillance
Usage Environment	Residential / SMB / Retail / Commercial	Residential / SMB / Retail / Commercial	Retail / Commercial / Banking / Casino / Corporate / Government / Law Enforcement
Advantages	Built for 24/7 surveillance environments Engineered for compatibility in a wide range of surveillance systems Improved performance with AllFrame Technology Low power & quiet operation Enables upgrades & expansion of existing surveillance systems	Designed specifically for NVR surveillance systems (and backwards compatibile with DVR systems) Support for greater than 8 NVR surveillance bays with up to 64 HD camera count Increased workload capabilities (TB/year) with optimized power consumption Available in 4 TB & 6 TB capacities Designed with tarnish resistant components for premium protection in harsh environments	Designed for heavy application workloads StableTrac and RAFF for enhanced vibration tolerance Optional Self-encrypting Drive (SED) models 24x7x365 reliability
Number of Drive Bays	1 to 8 Bays	≥ 8 Bays (No Limit)*	≥ 8 Bays (No Limit)
Number of Cameras	1 to 32 Cameras	1 to 64 Cameras	No Limit
Power on Hours	24/7	24/7	24/7
RAID Support	Yes	Yes	Yes
Limited Warranty	3-Year	3-Year	5-Year

* The specific number of cameras and hard drive bays that can be supported will be dependent on a number of criteria including but not limited to: types and capability of cameras installed (resolution, frames per second, additional features) and the system’s hardware and software capability

Estimated Capacity

There are an infinite number of different combinations of camera resolutions, live cameras, frames per second, and archive settings. WD understands the uniqueness of each combination and offers a full line of capacity products and points to fulfill the complex needs surveillance systems present.

Estimated Capacity Requirements, in TB based on follow system set up:
Standard Definition Camera Resolution: 0.3 megapixesl (640 x 480)
30 frames per second
Compression: H.264

Estimated Capacity Requirements, in TB based on follow system set up:
High Definition Camera Resolution: 2.1 megapixels or 1080p (1920x1080)
30 frames per second
Compression: H.264

Lower temperature means greater reliability

In addition to high levels of clarity, long-term reliability and low-power consumption are equally critical to surveillance systems. Designed for 24/7 operation, WD surveillance-class drives consume less power during spin-up and operation, minimize heat dissipation and vibration, and operate reliably without compromising performance. Reducing heat, noise, and vibration enables surveillance applications to operate more reliably over longer periods of time.

Thermal images taken at the WD labs demonstrate how much cooler WD drives are when compared to the competitors' standard 7200 RPM hard drives.

When a drive operates at a lower temperature its lifespan increases.

In addition to high levels of clarity, long-term reliability and low-power consumption are equally critical to surveillance systems. Designed for 24x7 operation, WD drives with WD GreenPower Technology™ consume less power during spin-up and operation, minimize heat dissipation and vibration, and operate reliably without compromising performance. Reducing heat, noise, and vibration enables surveillance applications to operate more reliably over longer periods of time.

Annual Failure Rate vs. Hard Drive Base Casting Temp

The illustration below demonstrates the annual failure rate and how it correlates to the hard drive base casting temperature and power on hours (POH). Failure rates significantly increase as temperature rises. In a system operating 24x7 the impact is substantial.

The evolution of of surveillance

Safety and security are always a concern. Governments, corporations, and even individuals must protect themselves and their assets. One of the most popular methods employed to enhance security and safety is digital video surveillance. With increased presence and enhanced requirements of modern surveillance systems, there is a pressing need for specialized hard drives with more storage capacity and advanced features designed specifically for SDVRs, CCTV, IPTV and other surveillance mediums. As a worldwide storage leader, WD continually strives to design drives to exceed the demanding requirements of digital video surveillance. With design, development, manufacturing, and industry-leading customer support services, WD's surveillance partners receive best-in-class products with innovative feature sets, ensuring that digital video surveillance systems equipped with WD drives are optimized for maximum performance.

Surveillance storage for peace-of-mind

Whether you're protecting your personal assets and loved ones or monitoring the business you worked hard to build, you can rely on surveillance-class storage built by one of the largest hard drive manufacturers in the world. WD Purple surveillance hard drives are designed for high temperature, always-on, surveillance security systems to ensure reliability and quality video play back when you need it most. Experience the security of knowing you're using a surveillance-class drive designed by a leader in the storage industry.

Drive Views:

Bottom View

Top Angle View

Right Angle View

Cover View

Documentation:

Download the WD Purple Surveillance Specsheet (PDF).