WD Purple 4TB Surveillance Hard Drive (WD43PURZ)
The WD Purple WD43PURZ delivers reliable 4TB surveillance storage purpose-built for 24/7 NVR and DVR systems. With 5400 RPM rotational speed, 256 MB of cache, and a 180 TB/year workload rating, this drive handles continuous video ingest in retail, office, and small-to-medium business deployments. Western Digital's AllFrame technology reduces frame loss during simultaneous multi-stream recording, supporting Up to 64 cameras for cost-effective surveillance archives.
Key Features
- 4TB capacity for extended video retention—weeks to months of continuous recording on standard surveillance configurations
- 5400 RPM rotational speed with 256 MB of cache for sustained sequential write performance during multi-camera ingest
- 180 TB/year workload rating—designed for the duty cycle of standard desktop drives, validated for round-the-clock surveillance operation
- 1.0 million hours MTBF reliability rating for mission-critical security deployments where uptime matters
- AllFrame technology reduces frame drops and pixelation during high-bandwidth recording, especially with H.264/H.265 multi-stream feeds
- SATA 6 Gb/s interface with 180 MB/s sustained transfer rate for seamless integration with standard NVR/DVR controller boards
- 3.5-inch form factor compatible with virtually all surveillance NVRs, DVRs, and rackmount video storage chassis
- Up to 64 cameras with Up to 16 AI streams—engineered for AI-ready surveillance workloads with deep-learning analytics streams
- Operating temperature 0°C to 65°C—suitable for unconditioned IT closets, server rooms, and indoor surveillance enclosures
- 3-year limited warranty backed by Western Digital's manufacturer support
Built for Surveillance Workloads
WD Purple drives are the surveillance-grade complement to consumer Blue drives and enterprise Red NAS drives. Where a desktop drive would fail under sustained 24/7 write workloads, the Purple line is validated for 180 TB/year of continuous writes and 1.0 million hours MTBF—matching the duty cycle of NVR/DVR recording in retail, office, multi-tenant residential, and small-to-medium business deployments.
AllFrame technology is WD's answer to the pixelation and dropped frames that plague consumer drives in surveillance applications. Streaming-mode firmware prioritizes write completeness over benchmark IOPS, holding video frames in cache and writing them sequentially without competing with system-level read operations. For multi-camera systems running H.264 or H.265 compression, this directly translates to fewer corrupt clips and cleaner playback.
The WD43PURZ integrates with virtually any standard 3.5-inch SATA bay—Hanwha, i-PRO, Vivotek, Speco, Geovision, and most generic NVR/DVR controllers. Drive trays, caddies, and SATA backplanes use the standard 3.5-inch form factor. SATA 6 Gb/s is backward-compatible with SATA II (3 Gb/s) and SATA I (1.5 Gb/s) controllers, though sustained throughput is highest on a SATA 6 Gb/s host.
Choose the WD43PURZ when you need cost-effective 4TB surveillance storage with manufacturer-validated workload ratings. For large multi-site deployments, AI-enabled NVRs, or environments approaching 550 TB/year of writes, step up to the WD Purple Pro line for the higher MTBF and AI-stream capacity.
Product Documentation
Download the WD43PURZ datasheet for the complete WD Purple specification sheet, compatibility matrix, and physical/environmental tolerances.
