WD Purple 1TB Surveillance Hard Drive (5400 RPM, 64MB Cache, Up to 64 HD Cameras)

Product Overview

The WD11PURZ 1TB 3.5" Surveillance Hard Drive is a purpose-built, high-reliability internal mechanical storage drive, engineered specifically to tackle the extreme thermal fluctuations, structural vibrations, and write-intensive demands of 24/7 always-on CCTV environments, this drive delivers dependable video retention for professional DVR and NVR installations without dropped frames or stream degradation.

Equipped with Western Digital's proprietary AllFrame™ technology, the WD11PURZ improves ATA streaming to mitigate frame loss, refine video playback, and support architectures with up to 64 single-stream high-definition (HD) cameras. Operating at an energy-efficient 5400 RPM spindle speed using conventional magnetic recording (CMR) and backed by a 64MB DDR cache on a SATA 6.0 Gb/s (SATA3) interface, this drive boasts an annualized workload rating of 180 TB/year—up to three times the workload capability of standard desktop drives. It is ideal for residential security setups, retail storefronts, and commercial facilities requiring continuous surveillance write endurance.

✅ Key Features

• Surveillance-Grade Engineering: Purpose-built for 24/7 continuous operation in high-definition video surveillance recording systems.

• Exclusive AllFrame™ Technology: Reduces video frame drops, enhances overall playback quality, and optimizes multi-camera streaming workloads.

• Support for up to 64 HD Cameras: Engineered to ingest up to 64 single-stream high-definition surveillance channels concurrently.

• Workload Rating up to 180 TB/Year: Delivers up to 3× the workload endurance of standard desktop hard drives to withstand constant write streams.

• CMR (Conventional Magnetic Recording): Utilizes reliable CMR technology to ensure consistent, sustained write speeds across full capacities.

• Energy-Efficient 5400 RPM Spindle: Minimizes heat output, reduces acoustic emissions, and limits vibration within multi-drive NVR chassis.

• 64MB Cache & SATA 6 Gb/s: Provides sustained write throughput and dependable data buffering for uninterrupted video ingestion.

• Tarnish-Resistant Components: Built with corrosion-resistant internal components for long-term operational integrity in harsh physical environments.

📸 Compatible Devices

• Digital Video Recorders (DVR) and Network Video Recorders (NVR) with standard 3.5" SATA bays

• Hybrid CCTV security recorders (AHD, TVI, CVI, Analog)

• Surveillance-oriented Network Attached Storage (NAS) units (1 to 8-bay setups)

• Video Management System (VMS) servers and centralized recording appliances

• Standalone security workstations and direct-attached storage (DAS) enclosures

🕐 Approximate Recording Capacity at 1TB

• 4-Camera System @ 1080p (H.264, 15fps): ~10–14 days of continuous recording

• 4-Camera System @ 1080p (H.265, 15fps): ~20–28 days of continuous recording

• 8-Camera System @ 1080p (H.265, 15fps): ~10–14 days of continuous recording

• 16-Camera System @ 1080p (H.265, 15fps): ~5–7 days of continuous recording

• 4-Camera System @ 4MP (2K, H.265, 15fps): ~12–16 days of continuous recording

• Motion Detection Mode: Up to 2–3× longer retention compared to continuous streams

Note: Actual recording days depend heavily on video compression standards (H.264 / H.265 / Smart Codecs), individual camera bitrates, framerates, audio recording channels, scene complexity, and motion detection configurations.