Western Digital WD Purple Pro Surveillance HDD
WD Purple Pro 18TB (WD181PURP) 3.5-inch SATA surveillance HDD, 7200 RPM, 512MB cache, 550TB/yr—built for 24/7 multi-bay NVR and analytics workloads.
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Product overview
Western Digital introduced the Purple Pro family on May 18, 2021; this 18TB WD181PURP is the 3.5-inch SATA member built for smart‑video systems. It uses CMR recording with OptiNAND, spins at 7200 RPM, carries a 512MB cache, and is rated up to 272 MB/s. The line targets high‑uptime surveillance and analytics use with a 5‑year warranty and 2.5M‑hour MTBF. On our storage scale it’s a workstation‑tier HDD: it exists to ingest 24/7 multi‑stream video reliably with a high 550 TB/year workload rating and multi‑bay robustness. Ideal for NVRs, AI‑enabled recorders, and long‑retention archives where sequential write endurance matters. As of July 2026 it remains an active product.
- mass storage
Product highlights
- Engineered with advanced capabilities needed for high-end smart video solutions
- High performance, reliability and workload capability for advanced AI-enabled recorders, video analytics appliances, deep-learning servers and cloud-based storage
- Supports up to 550 TB/yr workload rate**.
- Designed with tarnish-resistant components for harsh environments, and with additional robustness for multi-bay enclosures
Specifications
- Capacity
- 18 TB
- Type
- HDD
- Form factor
- 3.5
- Hardware Interface
- SATA
- Data Transfer Rate
- 600 MB
- Read speed
- 272 MB/s
- Tdp
- 6 W
