Huawei H13-624_V5.5 HCIP-Storage V5.5 Exam Practice Test

The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* covers power management:

- Option A: True. “Correct expansion cable connections are required before power-on to ensure proper operation.”

- Option B: True. “The BMC system allows powering on controller enclosures via the external management IP when none are powered on.”

- Option C: False. “After an emergency power-off, the storage system is powered on via DeviceManager, CLI, or BMC, not by pressing the controller enclosure’s power button, which is used for normal power-on.”

- Option D: True. “In OceanStor Dorado 8000, powering on a controller enclosure automatically powers on cascaded disk enclosures.”

Thus, option C is false.

Cache watermarks in Huawei flash storage systems manage dirty data flushing. The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* explains:

- Option A: True. “The low watermark for dirty data should be around 20% to ensure sufficient buffer space.”

- Option B: True. “The high watermark should not be too high, and the gap between high and low watermarks should be sufficient to avoid frequent flushing.”

- Option C: True. “A high watermark that is too high causes I/O fluctuations and increased latency during traffic bursts.”

- Option D: False. “High watermarks affect write performance by delaying flushes, but low watermarks do not directly impact read performance, which depends on prefetch and cache hit ratios.”

Thus, option D 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 isnot mentioned in the official documentation, and reconstruction timing is flexible, making the statement false.

Syslog configuration in Huawei flash storage systems enables alarm and event logging. The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* explains:

- Option A: False. “Syslog configuration does not require SNMP or USM user setup, as Syslog operates independently for log forwarding.”

- Option B: True. “The ‘show notification syslog’ command displays the Syslog configuration, including content format.”

- Option C: True. “The ‘change syslog-notification format_type=cef’ command sets the Syslog format to Common Event Format (CEF).”

- Option D: False. “If the Syslog server uses certificates, the storage system must import the server’s CA certificate to establish secure communication.”

Thus, options A and D are false.

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.

The HyperSnap feature in Huawei flash storage systems, such as OceanStor Dorado, enables point-in-time snapshots for data protection. The *HCIP-Storage V5.5 Training Material (Module 2: Flash Storage Technologies)* states: “To create snapshots using HyperSnap, the storage pool containing the source LUNs must have sufficient available capacity to store snapshot metadata and copy-on-write (COW) data. If the storage pool lacks free space, snapshot creation for a protection group will fail.” This aligns with the question’s statement that a lack of available capacity in the storage pool prevents snapshot creation for a protection group, making the statement true. The material emphasizes that capacity issues are a common cause of snapshot failures, as snapshots require additional space for incremental changes.

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.

The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* describes DME IQ: “DME IQ is a cloud-based management service that supports uploading performance logs and Disk Health Analysis (DHA) logs from Huawei flash storage. DHA logs include routine disk run data, such as health status and I/O statistics, used for predictive maintenance.” This confirms the statement is true.

The Direct TCP Offload Engine (DTOE) 1.0 is a performance optimization feature in Huawei flash storage systems. The *HCIP-Storage V5.5 Training Material (Module 2: Flash Storage Technologies)* explains: “DTOE 1.0 offloads TCP processing from the CPU to dedicated hardware, reducing CPU resource consumption and latency. It operates in user mode to manage hardware queues, avoiding context switching overhead, and uses polling mode to minimize interrupt latency. Unlike traditional TCP processing, DTOE eliminates kernel mode interrupts, locks, system calls, and thread switching.” Let’s evaluate:

- Option A: False. DTOE offloads MAC frame processing to hardware, not the CPU, reducing CPU resource usage.

- Option B: True. The material confirms that DTOE operates in user mode, avoiding context switching.

- Option C: True. Polling mode is used to reduce latency, as stated in the material.

- Option D: False. DTOE eliminates kernel mode overheads like interrupts and system calls, contrary to the statement.

Thus, options A and D are false.

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.

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.

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 *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 anyfault type and has no special personnel requirements is false, as the method is limited and demands expertise.

The HyperCDP (Continuous Data Protection) feature in Huawei all-flash storage, like OceanStor Dorado, provides high-frequency snapshots. The *HCIP-Storage V5.5 Training Material (Module 2: Flash Storage Technologies)* states:

- Option A: True. “HyperCDP snapshots can be used for data analysis, application testing, and backup, as they provide consistent point-in-time copies.”

- Option B: True. “After a HyperCDP snapshot is created, write requests to the source LUN use copy-on-write (COW) technology, storing new data in a new storage pool location and updating the source LUN’s pointer.”

- Option C: False. The material clarifies: “HyperCDP snapshots can be directly mapped to hosts as read-only LUNs, without requiring file system sharing, for accessing point-in-time data.”

- Option D: False. “HyperCDP is optimized for high-density snapshots with low memory overhead, using metadata structures rather than full file system objects.”

Thus, options A and B are true.

SmartDedupe and SmartCompression are data reduction technologies in Huawei all-flash storage systems, such as OceanStor Dorado. The *HCIP-Storage V5.5 Training Material (Module 2: Flash Storage Technologies)* provides details:

- Option A: True. The material states: “Post-process compression involves writing data to storage media first, then reading it back for compression during idle periods.”

- Option B: True. The material confirms: “Inline deduplication divides data into blocks and calculates fingerprints to identify duplicates before writing.”

- Option C: False. The material clarifies: “Similarity-based deduplication, whether inline or background, requires dividing data into blocks to calculate fingerprints for similarity detection. Direct calculation without block division is not supported.” This makes the statement incorrect.

- Option D: True. The material notes: “Backup storage supports deduplication and compression for file systems to optimize space usage.”

Thus, option C is false.

This question pertains to Quality of Service (QoS) features in Huawei OceanStor Pacific series storage systems. The *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)* describes: “The OceanStor Pacific series supports the traffic shaping feature, which uses the classic token bucket algorithm to control the upper limit of traffic. When tokens in the bucket are insufficient, the system generates and adds tokens based on the operations per second (OPS) and bandwidth limits defined for the QoS control object.” Traffic shaping regulates data flow to preventnetwork congestion and ensure fair resource allocation, making it the correct feature name for this description.

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.

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.