WD WD121PURP-74B5SY0 Purple Pro – Surveillance Hard Drive 12 TB, 7200 RPM, SATA 6 Gb/s

The WD Purple Pro WD121PURP-74B5SY0 is a professional 12 TB hard drive for demanding surveillance and video analytics solutions. It is designed for the latest generations of AI-enabled recorders, deep learning servers and cloud platforms requiring high performance, reliability and heavy workload capability. The exclusive AllFrame AI technology reduces frame loss, optimises video playback and supports up to 32 AI streams for deep learning analytics. The drive features tarnish-resistant components and full multi-bay enclosure support, ensuring reliable operation even in harsh large-scale surveillance environments.

Key features

• Capacity: 12 TB
• Form factor & interface: 3.5", SATA 6 Gb/s (SATA/600)
• Spindle speed: 7,200 RPM
• Cache: 256 MB
• Sustained transfer rate: up to 245 MB/s
• Recording technology: CMR (Conventional Magnetic Recording)
• HelioSeal technology: 6th generation helium-sealed design for high capacity
• AllFrame AI: reduces frame loss and improves video playback; supports up to 32 AI streams for deep learning analytics
• Camera support: up to 64 single-stream HD cameras
• Workload rating: up to 550 TB/year
• MTBF: up to 2.5 million hours
• Operation: 24/7 continuous
• WDDA (Western Digital Device Analytics): proactive drive health monitoring and management
• Hot-plug support: yes (SATA hot-swap)
• Tarnish-resistant components: yes – suitable for harsh environments
• Multi-bay enclosure support: yes, including RAID and JBOD configurations
• Warranty: 5-year limited

The WD Purple Pro WD121PURP-74B5SY0 is the ideal choice for security system integrators seeking a highly reliable drive for NVRs, DVRs, video analytics appliances and AI servers operating under demanding 24/7 workloads.