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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.

The statement is FALSE because it incorrectly places the application-side backup plug-in inside the OceanProtect appliance.

Huawei ' s OceanProtect architecture separates the ProtectManager/DataMoveEngine components on the protection system from ProtectClient components that protect application data on hosts. The course specifically states that ProtectClient protects host application data and that the application being protected determines which agent software is installed.

The database-protection workflow therefore uses OceanProtect to schedule and coordinate the job, while application-aware operations are performed through the client/agent located with the protected database environment. In analogous Huawei database workflows, DataMoveEngine creates backup storage space, instructs ProtectClient to start the backup operation, ProtectClient mounts the storage space, and the host-side application plug-in invokes the database-specific backup mechanism.

Thus, even though Oracle RMAN is Oracle ' s native backup/recovery technology, saying that an RMAN plug-in in the appliance directly invokes the database interface misrepresents the architecture. Application-aware execution occurs through the protection client/agent associated with the Oracle host.

Study Guide Topics: Data Protection Solution → OceanProtect → Database Backup → ProtectClient → RMAN → ProtectManager/DataMoveEngine.

The OceanStor Pacific logical software architecture states that the index layer provides fine-grained space-layout management capabilities and that the index module “maps the data objects in the DROS or block module to the lower-layer Plog space.” The training materials separately define the surrounding block-service components. VBS provides standard iSCSI/SCSI access. EDS provides structured services and value-added features, while OSD provides data-persistence capabilities. OceanStor Pacific block storage also uses a multi-MDC design to enhance reliability. The MDC is therefore the metadata-control component associated with maintaining the logical metadata relationship between block data and its allocated storage space. VBS is the access layer and does not own the metadata mapping function; OSD persists the actual data; EDS provides the broader structured-data service. Maintaining space metadata and the data-to-space index relationship belongs to the Metadata Controller function.

Study Guide Topics: Scale-Out Storage Technology Presentation → OceanStor Pacific → Logical Software Architecture → Block Service → Index Layer → MDC/VBS/EDS/OSD.

Huawei explains that when a LUN snapshot is created and activated, “a data copy that is identical to the source LUN is generated.” The snapshot subsequently preserves data associated with that specific snapshot state.

The statement is therefore FALSE because a snapshot is fundamentally a point-in-time protection mechanism. It can recover data to the state represented by an available clean snapshot, but this does not automatically mean zero data loss. Any valid production changes written after the latest clean snapshot and before the ransomware incident may not exist in the restored snapshot.

The course makes the point-in-time property explicit for snapshot technology: snapshot data remains consistent with the source at the snapshot creation point.

Zero-data-loss protection is associated with technologies that synchronously maintain another valid copy, such as HyperMetro or synchronous replication, rather than ordinary scheduled snapshots. Consequently, snapshots can be highly effective for ransomware recovery when a clean recovery point exists, but the achievable RPO depends on the available snapshot protection points.

Study Guide Topics: Flash Storage Technology Presentation → HyperSnap → LUN Snapshot → Point-in-Time Recovery → RPO and Data Protection.