The OceanStor Pacific 9550 storage system uses HDD as primary storage to provide cost-effective data storage services. Each 5U chassis contains two storage nodes, providing a raw capacity range of 720 TB to 1920 TB, reducing the physical footprint of the cabinet by 62.5% compared to general-purpose storage servers. Designed for massive unstructured data storage, the storage system is compatible with the OceanStor Pacific 9950, a high-density performance model that enables building tiered storage solutions to maximize return on investment (ROI). Compared with the traditional model, the system's double-layer air duct design and counter-rotating fans reduce component failure rates by 50%, while the carbon fiber thermal pad and vapor chamber (VC) phase change heat dissipation improve the heat dissipation capacity of the entire system. 20%. Additionally, a complete Field Replaceable Unit (FRU) design enables 24/7 non-disruptive maintenance. OceanStor Pacific 9550 has industry-leading capacity density and provides high-availability data access services for scenarios such as high-performance computing (HPC), artificial intelligence (AI) applications, big data analysis, and long-term backup and archiving of massive data.