Western Digital 8TB Purple Pro Surveillance HDD, SATA 6 Gb/s, 256MB Cache, 3.5", WD8002PURP

Capacity
8 Terabytes (8 TB) of storage.

Form Factor
Standard 3.5‑inch internal HDD.

Interface
SATA III (6 Gb/s) interface. Backwards compatible with SATA II/I.

Spindle Speed (RPM)
7200 RPM, which gives better performance than lower speed (5400 RPM) surveillance drives.

Cache / Buffer Size
256 MB DRAM cache, which helps in smoothing read/write bursts and improving performance for multiple streams.

Sustained Transfer Rate
Up to ≈ 267 MB/s internal sustained transfer speed.

Workload Rating
Designed for heavy workloads: rated for ≈ 550 TB/year of data writes/reads. Suitable for always‑on surveillance / AI video systems.

Support for Many Cameras / Streams
Supports up to 64 HD camera single streams, plus up to 32 AI streams per drive in advanced systems.

Reliability / MTBF
MTBF (Mean Time Between Failures) of about 2,000,000 hours.

Non‑recoverable Read Error Rate
< 1 per 10^15 bits read.

Load/Unload Cycles
Rated for approx 600,000 load/unload cycles, which helps with durability especially in frequent use / power on/off or alarm‑triggered recording start/stop.

Operating / Environmental Conditions

• Operating temperature: 0 °C to 65 °C.

• Non‑operating (storage) temperature: −40 °C to +70 °C.

Power Consumption

• Read/write: about 7.3 Watts.

• Idle: ~6.5 W.

• Standby / sleep: ~0.3 W.

Dimensions / Weight
Approx 147 mm × 101.6 mm × 26.1 mm; weight ~ 715 grams.

Warranty & Special Features

• 5‑year limited manufacturer warranty.

• Features AllFrame AI technology to reduce frame drops, improve video playback and support multiple streams.

• Tarnish‑resistant components and design elements for reliability in harsher environments.