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Standard 3.5 inch internal hard drive with purple label

Western Digital

Western Digital Purple WD43PURZ 4TB 5.4K 256MB SATA 3.5" internal hard drive

SKU CH-EM2M-QB9ZX

A 4 TB surveillance hard drive built for 24×7 recording with a 256 MB cache and 5400 RPM spindle speed

  • InterfaceSATA 6Gbps
  • Capacity4TB
  • RPM5400 RPM
  • Form Factor2.5"
  • Built for 24/7 surveillance workloads
  • 4 TB capacity stores weeks of footage
  • 256 MB cache smooths concurrent streams
  • 5400 RPM balances throughput and heat
  • 5-inch SATA fits standard NVR bays

Surveillance Storage Engine

The Western Digital Purple WD43PURZ is a 4TB hard drive built for continuous recording in network video recorders. It targets installers and system integrators who need reliable 24/7 operation in surveillance environments rather than general desktop storage.

Sustained Write Behaviour

Engineered for always-on workloads, the drive handles the constant stream of multiple high-definition camera feeds without the thermal throttling or vibration sensitivity seen in standard desktop drives. Its firmware prioritises sequential write consistency over burst speed, keeping footage intact during extended recording sessions.

Pre-Installation Checklist

Verify your NVR or server has a free 3.5-inch drive bay and a SATA 6Gbps port with matching data and power cables. Confirm the chassis airflow can dissipate heat from a drive spinning at 5400 RPM in a multi-drive array. Ensure the recorder’s firmware supports drives of this capacity before ordering.

Points forts

  • Built for 24/7 surveillance workloads
  • 4 TB capacity stores weeks of footage
  • 256 MB cache smooths concurrent streams
  • 5400 RPM balances throughput and heat
  • 5-inch SATA fits standard NVR bays

Caractéristiques

BrandWestern Digital
Part NumberWD43PURZ
InterfaceSATA 6Gbps
Capacity4TB
RPM5400 RPM
Form Factor2.5"

Questions sur cet article

How much heat and noise does the 5400 RPM drive produce when recording 24 hours a day?

The 5400 RPM spindle and surveillance-tuned firmware are engineered for continuous operation inside NVR enclosures where elevated heat and vibration are normal.

What host connection does the SATA 6Gbps interface require on my recorder or PC?

A standard SATA data port and a SATA power connector from the system power supply are all that is needed.

Will the 3.5 inch form factor fit in the same drive bay as my older 3.5 inch surveillance drives?

Yes, the 3.5 inch dimensions match legacy surveillance bays, so it installs directly without adapters.

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