Western Digital WD Purple™ Hard Drives
Product Brief and Specifications
Product Highlights
Image shows a WD Purple 3.5" Surveillance Hard Drive with capacity up to 22TB.
- Capacity up to 22TB¹
- Designed for mainstream surveillance systems
- WD AllFrame™ technology delivers optimizations for write-intensive, low bit-rate, high stream-count workloads typical to surveillance applications
- Supports up to 550 TB/yr workload rate
- 5-year limited warranty⁹
WD Purple™ Pro Hard Drives
The Right Drive for Smart Video Surveillance
WD Purple™ drives are designed to meet the challenges of 24×7 video surveillance recording. These drives are engineered specifically for surveillance to help withstand the elevated heat fluctuations and equipment vibrations within NVR environments. An average desktop drive is built to run for only short intervals, not the harsh 24/7 always-on environment of a high-definition surveillance system. With WD Purple drives, you get reliable, surveillance-class storage that's tested for compatibility in a wide range of security systems. Exclusive WD AllFrame™ technology helps reduce frame loss and improve overall video playback.
Industry-Leading Storage. Surveillance You Can Trust.
Western Digital has provided surveillance-grade storage for more than a decade. With WD Purple™ Surveillance storage, drives are engineered for high temperature, always-on surveillance systems so you can rely on quality video when you need it most. WD Purple delivers smart video storage that you can trust and are backed by a 3-year limited warranty⁹.
Western Digital's Exclusive WD AllFrame™ Technology
All WD Purple™ drives are equipped with AllFrame™ technology, which helps reduce video frame drops and improves video recording and playback.
Enhanced Workload Ratings
WD Purple™ drives feature a workload rating of up to 180TB/year - up to three times that of desktop drives - to handle the unique demands of mainstream video surveillance DVR and NVR systems.
Multiple Cameras, Multiple Streams
Modern recorders now support multiple video streams per camera. WD Purple™ drives support up to 64 single-stream HD cameras. Modern recorders now support multiple video streams per camera. Select WD Purple™ drives support up to 64 single-stream HD cameras³. With so many options, you have the flexibility to upgrade or expand your security applications in the future.
Designed for Reliable Operation
Engineered for reliability with an MTBF of up to 1 million hours⁸ and backed with a 3-year limited warranty⁹, WD Purple drives feature tarnish-resistant components¹¹ and support for storage systems with up to 16 drive bays¹². WD Purple hard drives are designed with RAID error recovery control to help reduce failures in supported video recorders.
Wide Compatibility. Seamless Integration.
WD Purple™ hard drives are built with compatibility in mind, so you can quickly and seamlessly add capacity to your surveillance system. With a wide range of industry-leading enclosures and chipsets supported, you're sure to find the DVR or NVR configuration that's right for you.
Five-Year Limited Warranty
As an industry-leading hard drive manufacturer, Western Digital stands behind their surveillance storage solutions with a 3-year limited warranty⁹ included with every WD Purple™ drive.
Specifications
| 8TB | 6TB | 4TB | 3TB | 2TB | 1TB | |
|---|---|---|---|---|---|---|
| Model Number | WD85PURZ | WD64PURZ | WD43PURZ | WD33PURZ | WD23PURZ | WD11PURZ |
| Formatted capacity¹ | 8TB | 6TB | 4TB | 3TB | 2TB | 1TB |
| Form factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Advanced Format (AF) | Yes | Yes | Yes | Yes | Yes | Yes |
| Recording Technology | CMR | CMR | CMR | CMR | CMR | CMR |
| Interface | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s | SATA 6Gb/s |
| RoHS compliant² | Yes | Yes | Yes | Yes | Yes | Yes |
| Product Features | ||||||
| Cameras supported³ | Up to 64 HD | Up to 64 HD | Up to 64 HD | Up to 64 HD | Up to 64 HD | Up to 64 |
| Maximum Drive Bays Supported | 16 | 16 | 16 | 16 | 8 | 8 |
| Firmware Feature Name | AllFrame | AllFrame | AllFrame | AllFrame | AllFrame | AllFrame |
| Tarnish resistant components¹¹ | Yes | Yes | Yes | Yes | No | No |
| RV Sensors | Yes | Yes | Yes | Yes | No | No |
| Performance | ||||||
| Interface transfer rate (max)⁴ | 6 Gb/s | 6 Gb/s | 6 Gb/s | 6 Gb/s | 6 Gb/s | 6 Gb/s |
| Buffer to host | 215 MB/s | 180MB/s | 180MB/s | 180MB/s | 180MB/s | 180MB/s |
| Host to/from drive (sustained)⁵ | ||||||
| Cache (MB)⁶ | 256 | 256 | 256 | 256 | 64 | 64 |
| Reliability/Data Integrity | ||||||
| Load/unload cycles | 300,000 | 300,000 | 300,000 | 300,000 | 300,000 | 300,000 |
| Annualized workload rating⁷ | 180TB/yr | 180TB/yr | 180TB/yr | 180TB/yr | 180TB/yr | 180TB/yr |
| Non-recoverable read errors per bits read | <1 in 10¹⁴ | <1 in 10¹⁴ | <1 in 10¹⁴ | <1 in 10¹⁴ | <1 in 10¹⁴ | <1 in 10¹⁴ |
| MTBF⁸ | 1,000,000 | 1,000,000 | 1,000,000 | 1,000,000 | 1,000,000 | 1,000,000 |
| Limited warranty (years)⁹ | 3 | 3 | 3 | 3 | 3 | 3 |
| Power Management¹⁰ | ||||||
| Average power requirements (W) | ||||||
| Read/Write | 5.3 | 4.7 | 4.7 | 4.6 | 3.8 | 3.8 |
| Idle | 4.7 | 4.3 | 4.3 | 3.7 | 3.2 | 3.2 |
| Standby and Sleep | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Environmental Specifications | ||||||
| Temperature (°C, on the base casting) | ||||||
| Operating | 0 to 65 | 0 to 65 | 0 to 65 | 0 to 65 | 0 to 65 | 0 to 65 |
| Non-operating | -40 to 70 | -40 to 70 | -40 to 70 | -40 to 70 | -40 to 70 | -40 to 70 |
| Shock (Gs) | ||||||
| Operating (2 ms, read/write) | 70 | 30 | 30 | 30 | 30 | 30 |
| Operating (2 ms, read) | 70 | 65 | 65 | 65 | 65 | 65 |
| Non-operating (2 ms) | 250 | 250 | 250 | 250 | 250 | 250 |
| Acoustics (dBA) | ||||||
| Idle | 24 | 23 | 23 | 23 | 21 | 21 |
| Seek (average) | 28 | 27 | 27 | 27 | 26 | 26 |
| Physical Dimensions | ||||||
| Height (in./mm, max) | 1.028/26.1 | 1.028/26.1 | 1.028/26.1 | 1.028/26.1 | 1.028/26.1 | 1.028/26.1 |
| Length (in./mm, max) | 5.787/147 | 5.787/147 | 5.787/147 | 5.787/147 | 5.787/147 | 5.787/147 |
| Width (in./mm, ± .01 in.) | 4/101.6 | 4/101.6 | 4/101.6 | 4/101.6 | 4/101.6 | 4/101.6 |
| Weight (lb/kg, ± 3%) | 1.58/0.72 | 1.26/0.57 | 1.26/0.57 | 1.26/0.57 | 0.99/0.45 | 0.99/0.45 |
¹ 1MB = 1 million bytes, 1GB = 1 billion bytes, and 1TB = 1 trillion bytes. Actual user capacity may be less depending on operating environment.
² This drive is in compliance with the European Union Directive 2011/65/EU and Directive (EU) 2015/863 on the restriction of the use of certain hazardous substances in electrical and electronic equipment.
³ Single stream at 3.2Mbps (1080p, H.265, 25 fps). Results may vary depending on camera resolution, file format, frames per second, software, system settings, video quality, and other factors.
⁴ Gigabit per second (Gb/s) = one billion bits per second. Effective maximum SATA 6 Gb/s transfer rate calculated according to the Serial ATA specification published by the SATA-IO organization as of the date of this specification sheet. Visit www.sata-io.org for details.
⁵ 1 MB/s = 1 million bytes per second. Based on internal testing; performance may vary depending upon host device, usage conditions, drive capacity, and other factors.
⁶ Controlled unload at ambient condition.
⁷ Workload Rate is defined as the amount of user data transferred to or from the hard drive. Workload Rate is annualized (TB transferred x (8760 / recorded power-on hours)). Workload Rate will vary depending on your hardware and software components and configurations.
⁸ MTBF specifications are based on a sample population and are estimated by statistical measurements and acceleration algorithms under typical operating conditions: workload of 90TB/year and drive temperature of 40°C. Derating of MTBF will occur above these parameters, up to 65°C drive temperature. MTBF does not predict an individual drive's reliability and does not constitute a warranty.
⁹ See http://support.wdc.com/warranty for regional specific warranty details.
¹⁰ Power measurements at room-ambient temperature.
¹¹ Tarnish resistant components for capacities 3TB and higher.
¹² 1TB through 2TB support up to eight bays; 3TB and above support up to 16 bays.
