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Bare 3.5-inch internal hard drive with silver metal casing and exposed circuit board

Western Digital

Western Digital WD121PURZ 12TB 7200 RPM 256MB SATA 6.0Gb/s 3.5" internal hard drive

SKU CH-ESEX-1RZ2V MPN WD121PURZ

A 12TB 3.5" SATA surveillance drive rated for 180TB/yr workloads and up to 64 cameras with AllFrame technology

  • PackagingBare Drive
  • InterfaceSATA 6.0Gb/s
  • Capacity12TB
  • RPM7200 RPM
  • Cache256MB
  • FeaturesCapacity up to 12TB Support for up to 64 cameras per drive A

Options 12TB 7200RPM

Struck-through versions exist but are not stocked here.

  • Built for 180TB/yr surveillance workloads
  • Supports up to 64 cameras per drive
  • Up to 16 AI channels for Deep Learning analytics
  • 5M hours MTBF for long-term reliability
  • 256MB cache and 7200 RPM for write-intensive streams

12TB Surveillance Hard Drive

The WD Purple WD121PURZ is a 12TB 3.5-inch internal hard drive built for continuous video recording. It spins at 7200 RPM with a 256MB cache and connects via a SATA 6.0Gb/s interface. The drive supports up to 64 cameras and handles workloads of up to 180TB per year.

Check SATA Port and Bay Space

Verify your recorder or server has a free SATA 6.0Gb/s port and a standard 3.5-inch drive bay. The unit measures 147.00mm long, 101.60mm wide and 26.10mm high. It is a bare drive supplied without cables, mounting screws or a bracket, so confirm your enclosure includes the necessary hardware.

Ideal for Multi-Bay NVRs, Not for Boot Drives

This drive suits installers expanding network video recorders that need prioritised write performance and AllFrame technology for stream integrity. It also supports up to 16 AI channels for deep-learning analytics on compatible systems. Builders wanting a low-power archive drive or a fast operating-system disk should consider a different model.

Highlights

  • Built for 180TB/yr surveillance workloads
  • Supports up to 64 cameras per drive
  • Up to 16 AI channels for Deep Learning analytics
  • 5M hours MTBF for long-term reliability
  • 256MB cache and 7200 RPM for write-intensive streams

Specifications

BrandWD
SeriesPurple
ModelWD121PURZ
PackagingBare Drive
InterfaceSATA 6.0Gb/s
Capacity12TB
RPM7200 RPM
Cache256MB
FeaturesCapacity up to 12TB
Support for up to 64 cameras per drive
AllFrame technology
Up to 16 AI channels for Deep Learning analytics on AI-enabled NVRs (8TB, 10TB & 12TB capacities)
MTBF of up to 1.5 million hours
UsageFor Video Surveillance
Form Factor3.5"
Height (maximum)26.10mm
Width (maximum)101.60mm
Length (maximum)147.00mm
Shipping weight0.82 kg
Package size206 × 163 × 109 mm

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