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Silver 3.5 inch hard drive with green label, SATA connectors visible

Western Digital

Western Digital WD44PURZ 4TB Purple 3.5" SATA 7200 RPM 128MB Cache

SKU CH-JVTN-P0RN0

A 4 TB 3.5" SATA drive built for surveillance workloads up to 180 TB per year with AllFrame technology supporting 64 cameras and 16 bays

  • PackagingRetail
  • InterfaceSATA 6.0Gb/s
  • Capacity4TB
  • RPM7200 RPM
  • Cache128MB
  • Form Factor3.5"
  • Surveillance-optimised firmware handles up to 64 HD cameras
  • AllFrame technology sustains 180 TB/yr write workloads
  • 7200 RPM and 128 MB cache deliver up to 175 MB/s transfer
  • 5-inch SATA 6.0 Gb/s fits up to 16 drive bays
  • Operates 0 °C to 65 °C with tarnish-resistant components

Built for Surveillance Recording

The WD Purple 4TB drive is engineered for mainstream surveillance systems that run continuous write workloads. Its AllFrame firmware optimises low bit-rate, high stream-count recording across up to 64 HD cameras. A 180TB per year workload rating and support for 16 drive bays suit multi-camera installations.

Fits Standard Desktop Bays

The 3.5-inch SATA form factor slides into any desktop chassis with a matching drive bay and a SATA 6.0Gb/s port. CMR recording technology and a 128MB cache sustain steady sequential writes without the latency spikes of shingled media. Tarnish-resistant components extend service life in always-on environments.

Four Terabytes of Continuous Capacity

The 4000GB capacity stores weeks of footage from multiple streams before overwriting begins. Sustained transfer rates reach 175MB/s, keeping pace with simultaneous camera feeds. Operating limits of 0°C to 65°C cover typical indoor recorder locations.

Points forts

  • Surveillance-optimised firmware handles up to 64 HD cameras
  • AllFrame technology sustains 180 TB/yr write workloads
  • 7200 RPM and 128 MB cache deliver up to 175 MB/s transfer
  • 5-inch SATA 6.0 Gb/s fits up to 16 drive bays
  • Operates 0 °C to 65 °C with tarnish-resistant components

Caractéristiques

BrandWestern Digital
SeriesPurple
PackagingRetail
InterfaceSATA 6.0Gb/s
Capacity4TB
RPM7200 RPM
Cache128MB
Form Factor3.5"

Questions sur cet article

How much data can I write to this 4TB Purple drive each year before I hit its workload limit?

The drive is rated for up to 180TB per year, which is the workload ceiling that appears first under sustained surveillance recording.

What operating temperature and acoustic profile should I expect when this 7200 RPM drive runs continuously in a multi-bay chassis?

Operating temperature range is 0°C to 65°C; the drive uses CMR recording and WD AllFrame firmware to manage heat and vibration in up to 16-bay enclosures.

Which host interface and physical bay does this 3.5-inch drive require to work in my recorder?

It needs a SATA 6.0Gb/s port and a standard 3.5-inch drive bay with SATA power and data cables.

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