Highlights

• 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 and a 5-year limited warranty

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

https://documents.westerndigital.com/content/dam/doc-library/en_us/assets/public/western-digital/product/data-center-drives/ultrastar-dc-hc500-series/data-sheet-ultrastar-dc-hc550.pdf