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Silver 3.5 inch internal hard drive with circuit board visible

Western Digital

Western Digital WD81PURZ Purple 8 TB 5400 RPM 256 MB 3.5" SATA internal hard drive

SKU CH-QZ2X-9QATQ

An 8 TB 3.5" SATA internal drive with 256 MB cache and 5400 RPM spindle speed, built for continuous surveillance recording

  • 8 TB capacity stores weeks of surveillance footage
  • 256 MB buffer smooths multi-stream recording
  • 5400 RPM spindle balances throughput and power draw
  • SATA 6 Gb/s interface fits standard 3.5" bays

Surveillance Storage Capacity

The Western Digital Purple 8 TB drive is built for continuous video recording in surveillance systems. Its 5400 RPM spindle speed and 256 MB buffer support sustained write workloads across multiple cameras. The 3.5 inch SATA form factor fits standard desktop drive bays and NAS enclosures.

Sustained Write Behaviour

Firmware tuned for streaming workloads keeps performance steady during long recording sessions rather than optimising for burst speeds. AllFrame technology reduces frame loss when many streams write at once. The drive is not suited for random-access primary storage or boot duties where low latency matters.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $244.99
Pricier than about 76% of the 4,938 comparable items (median $107.99).

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Specifications

Product
Brand nameWestern Digital

Questions about this item

How much heat and noise does the 5400 RPM spindle produce during continuous operation?

The 5400 RPM spindle speed is tuned for always-on surveillance workloads, keeping power draw and heat output low during extended use.

Does the 3.5 inch form factor need a specific drive bay or mounting hardware to install?

The 3.5 inch form factor fits standard desktop drive bays and uses the SATA interface for both data and power connections.

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