The OceanStor Pacific architecture states: “Storage engine layer: implements persistent storage.” It further specifies that this layer provides “erasure coding (EC), data rebuilding and balancing, disk management, and data read/write capabilities.”
Therefore, C. Data reconstruction belongs to the engine layer.
Option A, tiered storage, is implemented as an advanced storage-service capability through features such as SmartTier, meaning it belongs logically to the service layer rather than the persistence engine. Option B, protocol interworking, is associated with service/interface processing. Huawei specifically describes multi-protocol access and interworking for NFS, CIFS, POSIX, MPI, S3, and HDFS in the interface/service architecture.
Option D, service configuration, is part of storage management, alongside installation, deployment, user management, device management, alarm reporting, monitoring, upgrade, and capacity expansion.
The architectural separation is therefore clear: interfaces expose protocols; the service layer implements storage services and value-added functions; the engine layer provides persistent storage, redundancy, rebuilding, balancing, and disk I/O; and management performs administrative operations.
Study Guide Topics: Scale-Out Storage Technology Presentation → OceanStor Pacific → Functional Architecture → Storage Engine Layer.
