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Silver 3.5-inch SATA hard drive with label showing 18TB capacity

Western Digital

Western Digital WD181KRYZ 18TB 7200 RPM 512MB Cache SATA 3.5" Internal Hard Drive

SKU CH-83ZD-NFSRA MPN WD181KRYZ

Enterprise-class 18 TB hard drive with 7200 RPM, 512 MB cache and SATA interface for demanding storage workloads

  • InterfaceSATA 6.0Gb/s
  • Capacity18TB
  • RPM7200 RPM
  • Cache512MB
  • FeaturesConquer tough workloads with enterprise-grade WD Gold HDDs.
  • UsageFor Enterprise Storage

Options 18TB

  • 18 TB capacity for massive data storage
  • 7200 RPM speed for responsive enterprise workloads
  • 512 MB cache to accelerate frequent read operations
  • 5 million hours MTBF for proven long-term reliability
  • SATA 6.0 Gb/s interface for broad server compatibility

Product identity

The Western Digital WD181KRYZ is an 18TB 3.5-inch internal hard drive built for enterprise storage. It runs at 7200 RPM with a 512MB cache on a SATA 6.0Gb/s interface and carries a 2.5M hour MTBF rating.

Who this suits and who it does not

This drive suits operators of enterprise-class storage systems and data centres that need high-capacity, high-reliability bulk storage. It is not for builders who need the low latency of solid-state media or the throughput of a PCIe interface.

Deciding specification

The SATA 6.0Gb/s interface is the single specification that determines compatibility; the host must provide a matching SATA port and the system must accept a 3.5-inch form factor.

Highlights

  • 18 TB capacity for massive data storage
  • 7200 RPM speed for responsive enterprise workloads
  • 512 MB cache to accelerate frequent read operations
  • 5 million hours MTBF for proven long-term reliability
  • SATA 6.0 Gb/s interface for broad server compatibility

Specifications

BrandWD
SeriesGold
ModelNE-WD181KRYZ
InterfaceSATA 6.0Gb/s
Capacity18TB
RPM7200 RPM
Cache512MB
FeaturesConquer tough workloads with enterprise-grade WD Gold HDDs. Available in 1TB to 18TB capacities
Enhanced reliability with up to 2.5M hours MTBF
Specifically designed for use in enterprise-grade data centers and storage systems
Improve performance with our vibration protection technology
HelioSeal technology delivers high capacities with a low power draw [12TB and above]
Energy Assisted Magnetic Recording (EAMR) and Triple State Actuator (TSA) (in 16TB capacities and above)
UsageFor Enterprise Storage
Form Factor3.5"
Height (maximum)26.10mm
Width (maximum)101.60mm
Length (maximum)147.00mm
Shipping weight1.13 kg
Package size196 × 152 × 76 mm

Other versions of this model

5 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the WD181KRYZ ship with mounting screws or a SATA cable, or must they be purchased separately?

The drive is supplied as a bare 3.5-inch unit; mounting screws and a SATA 6.0Gb/s data cable are not included and must be sourced separately.

When should I choose the 18TB WD Gold model over the smaller capacities in the same series?

Select the 18TB version when you need maximum capacity per bay for enterprise workloads such as large-scale RAID arrays, backup targets or surveillance storage, while still benefiting from the 7200 RPM speed and 512MB cache.

What sustained throughput can I expect from the 7200 RPM SATA 6.0Gb/s interface in a typical server chassis?

The 7200 RPM spindle and SATA 6.0Gb/s link deliver sequential read and write speeds suited to heavy enterprise workloads, with the 512MB cache helping to smooth burst traffic in multi-drive arrays.

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