This question pertains to the configuration of basic storage services in Huawei OceanStor Dorado series storage systems. According to the *HCIP-Storage V5.5 Training Material (Module 4: Storage Design and Implementation)*, basic service configuration involves essential steps to enable storage access for hosts. The material outlines the following:

- Configuring connectivity between a host and the storage system (Option A) is mandatory, as it involves setting up physical or logical connections (e.g., Fibre Channel or iSCSI) to allow the host to communicate with the storage system. Without this, no storage services can be accessed.

- Creating a mapping (Option C) is also mandatory, as it maps LUNs to hosts or host groups, enabling the host to access specific storage resources. The material states: “Mapping is a critical step to associate LUNs with hosts for service access.”

- Creating a port group (Option B) is optional. Port groups are used to organize front-end ports for specific purposes (e.g., load balancing or zoning), but they are not always required, especially in simpler configurations where default port settings suffice.

- Creating a LUN group (Option D) is optional. LUN groups simplify management by grouping multiple LUNs for mapping, but they are not mandatory if LUNs are mapped individually.

Thus, options B and D are optional operations, as they are not always required for basic service configuration.

The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* details the low-level design (LLD) mode for Huawei scale-out storage: “In LLD mode, the Storage Deployment Tool (SDT) is used to plan nodes, networks, and clusters, generating a configuration file that guides subsequent installation and deployment.” The SDT ensures precise configuration for complex deployments, making it the correct tool for this task.

A is false. Huawei defines secondary resource protection as controlling the access status of the secondary resource . For example, the secondary volume/file system can be set to read-only or read/write , or in Pacific documentation, the secondary namespace does not receive host read/write services and only receives replication data. It does not mean suspending the replication relationship.

B is true. Huawei defines a pair as the data replication relationship between the primary and secondary LUNs/volumes . Huawei documentation also states that when the running status is Normal , data at the two sites has been synchronized successfully.

C is true. Huawei explicitly states that a consistency group is a collection of pairs that have a service relationship with each other .

D is true. Huawei describes synchronization as the process of synchronizing or copying data from the primary resource/volume to the secondary resource/volume

The question focuses on the client access modes supported by Huawei OceanStor Pacific series storage systems, particularly for parallel access scenarios. The *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)* explains: “The OceanStor Pacific series supports the NFS (Network File System) client access mode, which enables a single client to connect to multiple storage nodes for parallel data access. This mode is optimized for high-performance computing (HPC) workloads and supports MPI-I/O (Message Passing Interface Input/Output) for distributed applications.” NFS allows clients to access file systems across multiple nodes, facilitating scalable and parallel I/O operations, which aligns with the question’s description. The acronym “NFS” is the correct answer.

The correct answer is SmartQoS . Huawei’s OceanStor Pacific documentation states that SmartQoS supports OPS and bandwidth upper limit control by namespace, account, and client IP address . This matches the question exactly.

Configuring iSCSI block services on Huawei scale-out storage, like OceanStor Pacific, involves specific steps. The *HCIP-Storage V5.5 Training Material (Module 4: Storage Design and Implementation)* states: “To enable iSCSI block services, the engineer must create a block storage pool to allocate storage resources and configure the iSCSI service to set up initiator-target relationships and network parameters.” Let’s evaluate:

- Option A: Required. A block storage pool is necessary to provide the capacity for iSCSI LUNs.

- Option B: Required. Configuring the iSCSI service is essential to enable the protocol and connectivity.

- Option C: Not required. DPC is used for file services, not iSCSI block services.

- Option D: Not required. DPC installation is unrelated to iSCSI configuration.

Thus, options A and B are mandatory.

The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* describes the tools used for Huawei storage system deployment: “The Storage Deployment Tool (SDT) is designed to streamline software installation for Huawei storage systems. SDT collects and evaluates compatibility information in a one-stop manner and supports batch installation of UltraPath, the multipathing software, enhancing installation efficiency.” The SDT automates and simplifies deployment tasks, making it the correct tool for this description.

A is true. Huawei’s replication-cluster management documentation states that for capacity reduction, the number of nodes to be removed from a replication cluster must be greater than or equal to 4 . This matches the intent of the statement.

B is false. Huawei provides a Change Name operation for replication clusters, which shows that the replication cluster name can be changed . Therefore, the statement saying the name cannot be changed is incorrect.

C is false. Huawei states that the replication network cannot use the same subnet as other networks , and the replication network also does not share network ports with other networks . Therefore, saying it can share the same subnet is incorrect.

D is true. Huawei’s documentation for changing a replication cluster IP address states that when different replication ports on the same node use IP addresses in the same network segment , the original policy-based route must be deleted before a new policy-based route is configured .

Changing the management network port IP in Huawei flash storage systems is a common initialization task. The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* states:

- Option A: False. “The CLI command to change the management IP is ‘change system management_ip_address,’ not ‘change system management_ip.’”

- Option B: True. “Management and maintenance network ports must use different network segments to avoid routing conflicts.”

- _Index C: False. “No license is required to change the management network port IP address; it is a basic configuration task.”

- Option D: True. “For serial port login, the maintenance terminal’s IP and the default management IP must be in the same segment to establish connectivity.”

Thus, options A and C are false.

A is false. Huawei documentation shows that OceanProtect Backup Storage supports deduplication and compression for both LUNs and file systems , not only for LUNs. The file system creation parameters explicitly include dedup_enabled and compression_enabled, and Huawei’s remote replication command reference also distinguishes both lun and file_system objects on supported models.

B is true, so it is not selected. Huawei’s product highlights state that OceanProtect uses backup data preprocessing and variable-length deduplication to improve logical capacity utilization and reduce TCO. That matches the statement.

C is false. Huawei states that OceanProtect uses a compression algorithm to compress data blocks into smaller data blocks, and then combines and writes them into disks . So the statement is wrong because compression is not simply followed by direct disk writing “without the need to perform any operations”; there is still a combining/write process after compression.

D is false. The statement mixes up fixed-length and content-defined chunking. For fixed-length deduplication, data is divided into blocks of a fixed size , whereas Huawei’s deduplication description emphasizes variable-length deduplication for data reduction. Saying that fixed-length deduplication divides data into fixed-size blocks based on content is incorrect.

Option B is correct. Huawei documentation on SmartVirtualization explains that when no value-added feature is configured for an eDevLUN, the local storage system only needs to consume a small amount of space, mainly for metadata management. Therefore, each eDevLUN occupies only a small amount of space in the local storage pool.

Option C is also correct. Huawei states that eDevLUNs are created based on storage pools on the local storage system. This means eDevLUNs belong to storage pools created locally, even though the actual external capacity comes from the heterogeneous storage.

Option A is incorrect because it reverses the roles of the two storage systems. In SmartVirtualization, the actual data resides on the external/heterogeneous storage system , while the local storage system mainly stores metadata and provides management for value-added services. The option states the opposite, so it is false.

Option D is incorrect because Huawei requires the external LUN to be in a normal state before an eDevLUN can be created. If the external LUN is abnormal, the eDevLUN creation condition is not met. Therefore, eDevLUNs cannot be created regardless of external LUN status.