WD Purple 3.5" 3TB, 7200 RPM, 128MB, SATA III Hard Drive for Surveillance

The WD Purple 3TB hard drive is engineered for 24/7 video surveillance recording within NVR and DVR systems. Its construction is designed to manage the elevated heat and equipment vibrations typical of multi-drive security environments. To support consistent video capture, integrated AllFrame technology works to minimize frame loss and enhance playback reliability. The drive is built for continuous, write-intensive operations, providing a dependable storage solution for always-on recording tasks required in modern surveillance.

This 3.5-inch drive operates at 7200 RPM and includes a 128 MB cache, delivering sustained read and write speeds of up to 175 MB/s. It connects via a SATA interface supporting a 6 Gbit/s transfer rate, which facilitates efficient data handling from multiple high-resolution camera streams. Rotational vibration sensors are included to help maintain performance and reliability in enclosures with numerous drives. The unit is rated for a workload of up to 180 TB per year and has been tested for compatibility across a wide range of security systems.

• 3 TB storage capacity
• 3.5-inch form factor
• SATA interface with 6 Gbit/s transfer rate
• 7200 RPM spindle speed
• 128 MB buffer size
• 1,000,000-hour Mean Time Between Failures (MTBF)
• 4.16 ms average latency
• Supports S.M.A.R.T. monitoring technology
• 2 dB idle noise level
• Dimensions of 101.6 x 147 x 26.1 mm
• Weighs 570 g