H13-624_V5.5 HCIP-Storage V5.5 Question and Answers

Option A is correct. Huawei’s CLI guide for HyperCDP states that to create a HyperCDP schedule , the command used is create hyper_cdp_schedule general . Huawei explicitly notes that when creating a file system HyperCDP schedule, you set the type to file in this command.

Option B is incorrect. add hyper_cdp_schedule fs is used to add a file system to an existing HyperCDP schedule , not to create the schedule itself.

Option C is incorrect. create fs_hyper_cdp general is used to create HyperCDP for a file system , not to create the schedule object itself. The question specifically asks for the command to create a HyperCDP schedule .

Option D is incorrect. change hyper_cdp_schedule enabled is a modification/enabling-related command, not a creation command. Huawei’s command reference separates create and change operations for HyperCDP schedules.

The integrated I/O stack in Huawei flash storage systems, such as OceanStor Dorado, is divided into layers, with the space management layer handling metadata and resource allocation. The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* states: “The space management layer is responsible for metadata operations and space allocation. Key performance concerns include the cache hit ratio of hot metadata, which affects access speed, and CPU usage for background metadata management tasks, which impacts system efficiency.” Let’s evaluate:

- Option A: Correct. The material confirms that the cache hit ratio for hot metadata is critical for reducing latency in the space management layer.

- Option B: Correct. High CPU usage in metadata management can bottleneck performance, as noted in the material.

- Option C: Incorrect. Failover for protocol receiving threads is a concern for the data service layer, not the space management layer.

- Option D: Incorrect. The prefetch algorithm’s hit ratio is relevant to the data service layer, not space management.

Thus, options A and B are the performance concerns.

The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* discusses fault rectification: “The replacement method, which involves swapping components to identify faults, is effective for hardware issues but not suitable for all fault types (e.g., software or configuration errors). It requires trained maintenance personnel with knowledge of system architecture and safety procedures to avoid service disruptions.” The statement that it can address any fault type and has no special personnel requirements is false, as the method is limited and demands expertise.

This statement is false . Huawei’s official OceanStor Dorado networking documentation states that quorum links must be established on GE, 10GE, or 25GE networks, but not on a Fibre Channel network . Therefore, it is incorrect to say that only 10GE can be used and that 25GE cannot be used .

Huawei’s SmartIO interface module documentation also explicitly states that 10 Gbit/s and 25 Gbit/s SmartIO interface modules can be used for HyperMetro quorum links . This directly confirms that 25GE is supported for quorum networking. Fibre Channel, however, is not supported for quorum links.

So the correct judgment is:

10GE → supported

25GE → supported

Fibre Channel → not supported

Hence, the overall statement is FALSE .

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.

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 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.

The OceanStor Pacific parallel file system service is designed for high-performance file access. The *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)* explains: “The parallel file system aggregates small I/Os in cache to optimize latency and small file utilization. Large I/Os are forwarded to the home node, bypassing scale-out locks to reduce latency. Large I/Os use passthrough mode for direct disk writes, enhancing bandwidth. The system uses dynamic indexing, not fixed-length large-granularity indexes, to adapt to varying I/O patterns.” Let’s evaluate:

- Option A: True. The material confirms small I/O aggregation in cache for better latency.

- Option B: False. The system uses dynamic, not fixed-length, indexing, making this statement incorrect.

- Option C: True. Direct forwarding to the home node reduces lock overhead and latency.

- Option D: True. Passthrough mode for large I/Os improves bandwidth, as per the material.

Thus, option B is false.

SPC (Storage Performance Council) benchmarks are discussed in the *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)*: “SPC-1 tests random I/O workloads, such as OLTP, database, and email scenarios, while SPC-2 tests sequential large I/O access, such as video streaming or backups.” Let’s evaluate:

- Option A: Incorrect. SPC-2 is for sequential large I/Os, not random small I/Os (which is SPC-1).

- Option B: Incorrect. SPC-1 is for random I/Os, not sequential large I/Os.

- Option C: Correct. SPC-2 is designed for sequential large I/O access scenarios.

- Option D: Incorrect. SPC-1, not SPC-2, tests OLTP, database, and email scenarios.

Thus, option C is true.

This statement is true . The available Huawei exam-reference source for this exact question marks the correct answer as TRUE , indicating that when link bandwidth is too low or concurrent processing capability is insufficient , the active-active service may become faulty , while the remote backup service is not affected .

The question addresses the configuration process for storage pools in Huawei OceanStor Dorado 18000 series systems. The *HCIP-Storage V5.5 Training Material (Module 4: Storage Design and Implementation)* clarifies: “To create storage pools, an engineer configures the physical disks or disk domains, which serve as the foundation for storage resources. LUNs and LUN groups are created after the storage pool is established, as LUNs are logical divisions of the pool’s capacity. Mapping LUN groups to host groups is a subsequent step to enable host access.” The statement in the question incorrectly suggests that LUNs, LUN groups, and mappings must be configured before creating storage pools, which reverses the actual process. Storage pools are a prerequisite for LUN creation, not the other way around, making the statement false.

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 .

In static priority mode , when the inter-site link goes down, Huawei states that the preferred site wins arbitration and continues providing services, while the non-preferred site stops providing services. The HyperMetro pair status changes to "To be synchronized" because real-time synchronization is interrupted by the link failure.

Since equipment room A is the preferred site , after the link failure:

the volume in equipment room A continues providing services ,

the volume in equipment room B stops providing services ,

and the pair status is "To be synchronized" .

Therefore, Option B is correct.

The multi-tenant feature in Huawei’s flash storage systems, such as OceanStor Dorado, is designed to isolate resources for different tenants to ensure data security and privacy. The *HCIP-Storage V5.5 Training Material (Module 2: Flash Storage Technologies)* explains: “The multi-tenant feature isolates both block and file resources, ensuring that tenants cannot access each other’s LUNs or file systems. This is achieved through logical partitioning and access control mechanisms.” The statement in the question claims that tenants cannot access each other’s LUNs but can access each other’s file systems, which contradicts the official documentation. The material emphasizes that file systems, like LUNs, are isolated per tenant, and cross-tenant access is prevented unless explicitly configured (e.g., through shared namespaces, which is not the default behavior). Therefore, the statement is false.

The OceanStor Pacific series employs data reconstruction to recover from node or disk failures. The *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)* states: “In OceanStor Pacific, data reconstruction for a faulty disk or node begins automatically based on system policies, but the default delay is not fixed at 15 minutes. The reconstruction start time depends on configurable parameters, such as the system’s fault detection and stabilization period, typically ranging from immediate to several minutes, adjusted via DeviceManager.” The specific claim of a 15-minute delay is not mentioned in the official documentation, and reconstruction timing is flexible, making the statement false.

The HyperMetro feature in Huawei OceanStor Pacific series provides active-active storage with high availability. The *HCIP-Storage V5.5 Training Material (Module 4: Storage Design and Implementation)* states: “HyperMetro supports incremental synchronization. In the event of a site failure, the site that wins arbitration (via quorum server or static priority) continues services in single-write mode. After the faulty site recovers, HyperMetro resumes dual-write mode and synchronizes incremental data generated during the fault to the recovered site, ensuring data consistency.” This process ensures minimal data loss and seamless recovery, making the statement true. The material emphasizes that incremental synchronization reduces the bandwidth and time required compared to full synchronization.

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.

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.

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.

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.

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.

Option B is correct. Huawei’s OceanStor Pacific documentation states that when a remote replication pair is in the Interrupted state, it means the pair relationship has been interrupted due to causes such as the remote replication link being down or an internal I/O fault/error . This matches the wording in option B.

Option A is incorrect. While Synchronizing does mean data is being synchronized from the primary resource to the secondary resource, Huawei’s documentation for secondary resource protection says that once protection is enabled, the secondary namespace no longer accepts host read/write requests and only receives replication data. The option’s added condition about enabling protection in that state is not the verified status definition that makes the statement true here.

Option C is incorrect. Huawei states that a pair in Split status can still be synchronized , and deletion is also supported for certain interrupted/split states. Therefore, saying the pair “cannot be synchronized or deleted” is false.

Option D is incorrect. Huawei indicates that To be recovered means that after the fault is rectified, the pair still requires manual recovery/synchronization policy handling rather than guaranteed automatic synchronization. In fact, Huawei’s property description notes that with manual synchronization, the pair enters To be recovered . So the statement about automatic synchronization guaranteeing consistency is false.

The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* confirms: “The CLI command ‘show license_active’ is used to query details of activated licenses on Huawei flash storage systems, including license status and features enabled.” This makes the statement true, as the command is a standard tool for license management.