WD Purple Pro 3.5" 18TB, 7200 RPM, 512MB, SATA III Hard Drive for Surveillance

The Western Digital Purple Pro is a 3.5-inch internal hard drive providing 18 TB of storage capacity. It is engineered for advanced, AI-enabled smart video recorders, network video recorders (NVR), and analytics servers. The drive is constructed for continuous 24/7 operation, a standard requirement for modern surveillance systems. It is rated to handle recording workloads from up to 64 high-definition single-stream cameras simultaneously.

Performance is managed by a 7200 RPM spindle speed and a 512 MB cache, which facilitates the handling of high data-write demands typical of video recording. This model incorporates Rotational Vibration (RV) sensors to maintain stable performance in multi-bay systems where operational vibration is a factor. With a workload rating of up to 550 TB per year and a Mean Time Between Failures of 2.5 million hours, the drive is built for high-intensity, always-on environments. S.M.A.R.T. support is included for monitoring drive health and status.

• 18 TB storage capacity
• 3.5-inch form factor
• SATA interface with 6 Gbit/s transfer rate
• 7200 RPM spindle speed
• 512 MB cache size
• Up to 272 MB/s write speed
• 550 TB per year workload rating
• 2.5 million hours Mean Time Between Failures (MTBF)
• Integrated Rotational Vibration (RV) sensors
• Designed for 24/7 continuous operation
• Optimized for surveillance system workloads
• 20 dB noise level at idle
• 5.9 W power consumption at idle
• 101.6 x 147 x 26.1 mm dimensions
• 690 g weight