Huawei H13-624_V5.5 - HCIP-Storage V5.5

This question addresses the behavior of remote replication during a primary/secondary switchover in Huawei flash storage systems, such as OceanStor Dorado. The *HCIP-Storage V5.5 Training Material (Module 4: Storage Design and Implementation)* explains: “During a primary/secondary switchover in remote replication, the secondary site becomes the primary site and starts accepting write I/Os. The original primary site, if available, becomes the secondary site. Data changes are tracked incrementally, but full synchronization does not occur automatically after the switchover unless explicitly configured or triggered by a fault recovery process.” The question’s statement that “all data will be synchronized” implies an automatic full synchronization, which is not the default behavior. Instead, only incremental changes are synchronized when replication resumes, making the statement false.

The deployment of Huawei OceanStor Pacific series involves hardware and software setup. The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* explains:

- Option A: False. The material states: “Network initialization for nodes during software deployment can be performed via DeviceManager, the CLI, or the Storage Deployment Tool (SDT), but DeviceManager is not mandatory.” This makes the statement incorrect.

- Option B: True. “SmartKit supports batch OS installation for hardware deployment.”

- Option C: True. “SmartKit can configure clusters, including disabling LLDP and enabling BMC mobile customization.”

- Option D: True. “SmartKit is used to configure BMC settings and verify firmware, OS, and driver versions.”

Thus, option A is false.

The cache write policy for Huawei scale-out storage, like OceanStor Pacific, is critical for performance-sensitive applications like video surveillance. The *HCIP-Storage V5.5 Training Material (Module 4: Storage Design and Implementation)* states: “For video surveillance, which involves sequential large I/O writes, the write-back cache policy is recommended to maximize performance by buffering writes and reducing disk I/O latency. Write-through, which writes directly to disks, is less suitable due to higher latency.” The statement’s insistence on write-through for high-performance video surveillance is incorrect, as write-back is preferred, making the statement false.

The software installation process for Huawei OceanStor Pacific scale-out storage systems is detailed in the *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)*. Let’s evaluate each option:

- Option A: True. The material states: “For block service installation with converged compute and storage nodes, each node requires at least 20 vCPUs to support management and data processing tasks.”

- Option B: True. The material confirms: “In converged deployments, the disk quantity difference between any two nodes in a storage pool must not exceed 2 or 30% of the disk count on the node with the most disks to ensure balanced performance.”

- Option C: False. The material explains: “Wizard-based software installation automates node addition, network configuration, and control cluster creation via DeviceManager, reducing manual steps. Engineers do not need to perform these tasks manually before installing the OceanStor Pacific software.” This makes the statement incorrect.

- Option D: True. The material notes: “DPC installation requires a minimum of 20 GB of memory on compute nodes to ensure stable operation.”

Thus, option C is false.

This question addresses the process of adding DPC nodes in Huawei OceanStor Pacific systems. The *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)* states: “To add DPC nodes, engineers can use DeviceManager to either manually add nodes by entering the management IP address or batch import nodes using a template. For manual addition, the management IP address is required to establish communication with the node. For batch import, a template must be downloaded, filled with node details, and uploaded to complete the process. Authentication is required in both modes to ensure secure node addition.” Let’s evaluate:

- Option A: False. Authentication is required for both manual and batch methods to validate node addition.

- Option B: True. The material confirms that the management IP address is required for manual node addition.

- Option C: False. The service IP address is not used for node addition; the management IP is needed.

- Option D: True. The material describes the batch import process as requiring a filled template upload.

Thus, options B and D are true.

Fibre Channel (FC) link exceptions in Huawei OceanStor Dorado 18000 systems are addressed in the *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)*: “Common causes of FC link exceptions include mismatched port rates between the host and switch, poorly connected or faulty optical fibers, and mismatched optical module rates between host and storage front-end ports.” Let’s evaluate:

- Option A: Correct. Mismatched FC port rates between the host and switch cause link failures.

- Option B: Correct. Faulty or loose optical fibers disrupt FC connectivity.

- Option C: Correct. Mismatched optical module rates between host and storage ports lead to link exceptions.

- Option D: Incorrect. IP address settings are relevant to iSCSI, not FC, which uses physical connections.

Thus, options A, B, and C are possible causes.

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.

This question focuses on CLI operations for Huawei OceanStor Pacific scale-out storage systems. The *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)* provides guidance on CLI access modes: “To switch from the user view to the developer view on the CLI for OceanStor Pacific systems, the command ‘change user_mode current_mode user_mode=developer’ is used. This command elevates the user’s privilege level to access advanced configuration and debugging options.” Let’s evaluate the options:

- Option A: Incorrect. The command `change domain ad_manager` relates to Active Directory management, not view switching.

- Option B: Incorrect. The command `change dns general` configures DNS settings, not user modes.

- Option C: Correct, as it matches the documented command for switching to developer view.

- Option D: Incorrect. The command `change nas_Idap` configures LDAP settings for NAS services, not CLI view modes.

Thus, option C is the correct command.

Huawei scale-out storage, like OceanStor Pacific, uses multiple network planes. The *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)* states:

- Option A: True. “The internal management network handles communication for deployment, upgrades, resource configuration, alarms, and certificate updates.”

- Option B: False. “In DPC scenarios, the back-end storage network is used for internal communication between storage nodes and OSDs, not for DPC-to-OSD data transfer, which occurs over the service network.”

- Option C: True. “The management network connects to the customer’s management infrastructure for system administration.”

- Option D: True. “The service network interfaces with applications via S3, HDFS, NFS, CIFS, and POSIX.”

Thus, option B is false.