WD20PURZ-SS WD Purple 2TB SAS 64 MB 3.5" Surveillance HDD

High-Density 3.5in Surveillance HDD featuring 24x7 CMR recording with the WD20PURZ-SS

The WD20PURZ-SS is a 3.5in internal surveillance hard drive engineered for continuous write pipelines in DVR/NVR and edge recording systems where sustained ingest stability matters more than peak IOPS. With 2TB CMR capacity and 512e sector formatting, the WD20PURZ-SS supports predictable block behavior for long retention windows and consistent stream allocation across multi-camera deployments.

In typical architectures, the WD20PURZ-SS sits behind a SAS host interface on storage backplanes and RAID controllers, where TLER contributes to controlled error recovery aligned to array timeouts. A 5400 RPM spindle and 64MB cache balance sequential throughput with low power draw, making the WD20PURZ-SS suitable for dense chassis designs that prioritize thermals and acoustics while maintaining continuous availability targets.

Why Choose the WD20PURZ-SS?

The WD20PURZ-SS provides an enterprise-relevant density-to-reliability profile for edge and recording tiers, combining 24x7 duty capability with CMR consistency to reduce variability under sustained writes. For scalable retention pools, the WD20PURZ-SS supports RAID-tolerant behavior via TLER and aligns well with modular expansion where predictable drive recovery is critical to maintaining stream continuity.

WD designs the Purple series around workload-specific firmware behavior, endurance expectations, and operational stability, with engineering that maps to modern data centre practices such as controlled error handling, power efficiency, and serviceability in multi-bay environments. The WD20PURZ-SS targets long-life operation with an MTBF of 1,000,000 hours to support fleet standardization and lifecycle planning.

Key Applications:

• DVR/NVR continuous recording
• Edge video retention and expansion
• RAID-based surveillance storage pools
• Archive and cold data repositories

At Happyware - Server Hardware you benefit from non-binding offers tailored precisely to your needs for deploying WD20PURZ-SS drives at scale, and you can extend the warranty up to 6 years to align storage refresh cycles with your operational risk policy.