H13-624_V5.5 Sample Questions Answers

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.

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 valid write bandwidth calculation for Huawei flash storage accounts for data disks in a RAID configuration. The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* explains: “The valid write bandwidth of disks is calculated as the write bandwidth of a single disk multiplied by the number of disks, adjusted by the ratio of data disks to total disks to account for RAID overhead (e.g., parity disks). The formula is: Valid write bandwidth = Write bandwidth of a single disk × Number of disks × (Number of data disks / Total number of disks).” Let’s evaluate:

- Option A: Incorrect. This formula is for read bandwidth and uses system disks, not data disks.

- Option B: Incorrect. It does not account for RAID overhead, which reduces effective bandwidth.

- Option C: Correct. Matches the documented formula for valid write bandwidth.

- Option D: Incorrect. Port bandwidth is unrelated to disk write bandwidth calculations.

Thus, option C is correct.

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

- Option A: False. “SmartKit is used for hardware inspection, OS installation, and firmware upgrades, but it does not provide alarm reporting, file upload, or remote access capabilities.”

- Option B: True. “DeviceManager supports resource allocation, user management, data protection, performance monitoring, and alarm management.”

- Option C: True. “DME IQ provides cloud-based management, remote maintenance, and predictive analytics.”

- Option D: True. “The CLI supports all listed functions, including resource allocation and alarm management.”

Thus, option A is false.

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.

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.

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.

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 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.

The HyperClone feature in Huawei OceanStor Dorado systems creates full data copies for reliability and testing. The *HCIP-Storage V5.5 Training Material (Module 2: Flash Storage Technologies)* states: “HyperClone creates a full copy of a source LUN to a target LUN. A source LUN can form multiple HyperClone pairs with different target LUNs. Data copying starts at synchronization, but hosts must wait for the copy to complete before accessing the target LUN. HyperClone supports bidirectional synchronization, allowing data restoration from target to source. For block storage, it uses redirect-on-write (ROW), while file system clones use copy-on-write (COW).” Let’s evaluate:

- Option A: False. The material confirms that a source LUN can form multiple HyperClone pairs with different target LUNs.

- Option B: False. Hosts cannot access the target LUN until the copy process completes, contrary to the statement.

- Option C: True. Bidirectional synchronization is supported, including restoration from target to source.

- Option D: True. The material distinguishes ROW for block clones and COW for file system clones.

Thus, options A and B are false.

The SmartEncryption feature in Huawei OceanStor Pacific ensures data security. The *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)* explains:

- Option A: True. “For DPC or NFS reads, self-encrypting disks (SEDs) retrieve authentication keys from the key management server, decrypt ciphertext, and return plaintext to the protocol layer.”

- Option B: True. “SmartEncryption supports encrypted writes and decrypted reads via NFS, CIFS, HDFS, and S3 protocols.”

- Option C: False. “SmartEncryption encrypts data at the storage layer. Clients using NFS, CIFS, or DPC write data that is automatically encrypted by the system before storage, not written as plaintext.”

- Option D: True. “OceanStor Pacific uses SEDs for disk-level encryption, ensuring all service data is encrypted.”

Thus, option C is 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 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.

The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* describes user roles in Huawei flash storage systems: “The administrator role is a built-in role with full privileges, including managing users, performing system upgrades, changing the system time, powering off the device, and restarting the device.” This role is designed for comprehensive system management, confirming that the statement is true.

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.