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WD 18TB Ultrastar Data Center SATA HDD 0F38459 HC550, 512mb Catch 7200RPM

Product Code: WUH721818ALE6L4 SKU: pck1945 Categories: , ,

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WD 18TB Ultrastar Data Center SATA HDD 0F38459 HC550, 512mb Catch 7200RPM


  • Up to 18TB capacity in a standard 3.5-inch form factor
  • Industry’s first Energy-Assisted Magnetic Recording technology
  • Industry’s first Triple Stage Actuator
  • Leading HelioSeal technology
  • Reliable, field-proven design across five generations
  • HelioSeal design delivers power efficiency (Watts/TB)
  • 2.5M hours MTBF rating

Applications and Workloads

  • Cloud & Hyperscale Storage
  • Massive Scale-Out (MSO), high-density data centers
  • Distributed File Systems
  • Bulk storage using Object storage solutions like Ceph™ and OpenStack Swift
  • Primary and secondary storage for Apache Hadoop® for Big Data Analytics
  • Surveillance Analytics

Continuous Innovation for Highest Capacities and Lower TCO

The Ultrastar DC HC550 18TB CMR HDD and Ultrastar DC HC650 20TB SMR HDD are delivering industry leading capacity for the data center through a combination of new and proven technologies.

Western Digital is the first to deliver Energy-Assisted Magnetic Recording (EAMR) technology and a Triple Stage Actuator (TSA). These new technologies combined with further mechanical innovations and HelioSeal technology provide the industry’s highest capacities to enable data at scale with optimized TCO for data center architectures, while maintaining workload reliability and performance.

Extreme Capacity

18TB CMR HDD for hyperscale, cloud, and enterprise storage

Areal Density Leadership

Energy-Assisted Magnetic Recording technology, Triple State Actuator and 6th generation product with HelioSeal technology on a 9-disk platform


Cost-optimized configurations for every important capacity point



SATA 6 Gb/s



Format: Sector size (bytes)2



Data buffer (MB)3


Rotational speed (RPM)


SKU: pck1945 Categories: , ,

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