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WD Purple Pro 22TB WD221PURP Surveillance Hard Drive 3.5in SATA 6Gb/s 7200rpm 512MB CMR for NVR AI Video Systems

Brand:
Western Digital
WD Purple Pro 22TB SATA Surveillance HDD WD221PURP
WD Purple Pro 22TB WD221PURP Surveillance Hard Drive 3.5in SATA 6Gb/s 7200rpm 512MB CMR for NVR AI Video Systems
€1396.6 inc. VAT
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WD221PURP
€1,173.61 €1,304.01
€1,396.60 inc. VAT
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Product Code
03:222501
EAN Code
0718037893532
Manufacturer
Western Digital
Quick Specs
Capacity
22TB CMR (3.5in SATA)
Performance
7200rpm, 512MB, 265MB/s
Workload
550TB/yr, 2.5M hrs MTBF
Smart Video
64 HD cameras + 32 AI streams
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WD Purple Pro 22TB — Enterprise-Class Storage for AI Surveillance Systems

22TB CMR · Helium550TB/yr Workload64 Cameras + 32 AI Streams5-Year Warranty

The WD Purple Pro 22TB is an enterprise-class 3.5-inch SATA surveillance hard drive engineered for 24/7 smart-video duty in high-end NVRs, video analytics appliances, deep-learning servers and RAID/JBOD storage. Part number WD221PURP, it combines helium-sealed CMR recording with OptiNAND technology, a 7,200 RPM spindle, 512MB cache and sustained transfers up to 265MB/s — rated for a 550TB/year workload, 2.5-million-hour MTBF and support for up to 64 single-stream HD cameras plus 32 concurrent AI streams via WD's AllFrame AI firmware. Typically in stock with fast delivery across Cyprus.

Compatibility note: This is an internal 3.5" SATA drive for NVRs, surveillance servers and multi-bay enclosures — it is not an external/USB product. RV sensors and tarnish-resistant components make it suitable for dense multi-bay systems with no drive-bay limit. Confirm your recorder supports 22TB volumes before ordering.
Best For
✓ Large multi-camera CCTV/NVR installations
✓ AI video analytics & deep-learning appliances
✓ Long retention periods — weeks of 4K footage
✓ RAID/JBOD surveillance storage arrays
✓ Harsh sites — tarnish-resistant build, 0–65°C
✓ Integrators standardising on one big SKU

Key Features

 
Built for 24/7 Recording, Not Office Duty
A 550TB/year workload rating, 2.5-million-hour MTBF and 600,000 load/unload cycles put this in enterprise territory — desktop drives are typically rated for a fraction of this and fail early under constant surveillance writes.
 
AllFrame AI — 64 Cameras, 32 AI Streams
WD's AllFrame AI firmware improves ATA streaming to reduce dropped frames across up to 64 single-stream HD cameras, while supporting 32 concurrent AI streams for on-box deep-learning analytics — ready for modern smart cameras that transmit multiple streams.
 
Helium + CMR + OptiNAND at 22TB
Helium sealing enables 22TB with lower power and heat; conventional magnetic recording (CMR) keeps sustained write performance predictable — critical for video — and OptiNAND technology boosts capacity and reliability.
 
Multi-Bay Ready
Rotational-vibration sensors compensate for neighbouring drives in dense enclosures, tarnish-resistant components survive harsh environments, and WD imposes no drive-bay limit — backed by a 5-year limited warranty.

Technical Specifications

Identification
Part Number WD221PURP
EAN / GTIN 0718037893532
MPN WD221PURP
Drive
Capacity 22TB
Form Factor 3.5" internal
Interface SATA 6Gb/s
Recording / Tech CMR · Helium-sealed · OptiNAND
Spindle Speed 7,200 RPM
Cache 512MB
Transfer Rate Up to 265MB/s
Reliability & Smart Video
Workload Rating Up to 550TB/year (24/7 operation)
MTBF 2.5 million hours
Load/Unload Cycles 600,000
Camera Support Up to 64 single-stream HD cameras
AI Streams 32 concurrent (AllFrame AI firmware)
Multi-Bay RV sensors, no drive-bay limit, tarnish-resistant components
General
Operating Temperature 0°C to 65°C
Dimensions 147 x 101.6 x 26.1 mm
Weight 670 g
Warranty 5-year limited warranty

Frequently Asked Questions

Does the WD Purple Pro 22TB work with Hikvision, Dahua and other NVRs?
Yes — it is a standard 3.5" SATA drive designed specifically for surveillance recorders and is widely used in Hikvision, Dahua, Synology Surveillance Station and similar systems. The only check needed is that your specific recorder model supports volumes of 22TB; older NVRs sometimes cap supported drive sizes.
Is the WD Purple Pro suitable for a NAS or desktop PC instead of surveillance?
It will work, but it is optimised for continuous video streaming workloads. For general NAS file serving WD Red Pro is the matching tool, and for desktops WD Black/Blue — though in a Synology/QNAP running Surveillance Station, Purple Pro is exactly the right choice.
What is the difference between WD Purple and WD Purple Pro?
Workload class. Standard WD Purple (up to 8TB, 180TB/yr) suits home and small-business NVRs with up to 64 cameras. Purple Pro adds enterprise internals: 7,200 RPM, 550TB/yr workload, 2.5M-hour MTBF, 32 AI streams and a 5-year (vs 3-year) warranty — built for analytics servers and large installations.
What do I need to know before buying the WD221PURP?
It is an internal SATA drive (you need a free 3.5" bay and SATA port in your NVR/server), your recorder must support 22TB volumes, and in surveillance use footage is typically overwritten — for evidential retention, plan RAID or backup. The 5-year warranty covers the drive, not data recovery.
Singular Expert Insight
For installers, the maths usually favours fewer, bigger Purple Pro drives: one 22TB unit replaces three smaller disks, freeing bays, halving power draw per terabyte and simplifying RAID layouts. The Pro tier earns its premium specifically when recorders run analytics or more than a handful of 4K cameras — for a home 4–8 camera NVR, a standard WD Purple 4–8TB does the job for much less. One sizing rule of thumb: a 4K H.265 camera at 25fps consumes roughly 1TB per camera per month of continuous recording, so 22TB ≈ a month of retention for ~20 such cameras.

Buyer's Guide

Buy it if
You run a large or AI-enabled surveillance system — many 4K cameras, analytics appliances or RAID arrays — and need maximum retention with enterprise reliability (550TB/yr, 5-year warranty).
Skip it if
You have a small home NVR with a handful of cameras — a standard WD Purple costs far less — or you need general NAS/desktop storage, where Red Pro or Black/Blue are the matching lines.
Also consider
WD Purple Pro 18TB (WD181PURP) or 12TB (WD122PURP) to match your retention needs, or standard WD Purple 8TB for smaller installations.

Features - Western Digital - WD221PURP

Form Factor
  • 3.5",
  • External
Colour
purple
Interface
  • SATA
More Details
Product Code
03:222501
EAN Code
0718037893532
Manufacturer
Western Digital
Technical specifications
Capacity
22TB
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