H13-624_V5-5 Practice Questions

The statement describes the reliability mechanism of Huawei’s scale-out storage systems, such as

the OceanStor Pacific series, which employ cabinet-level security to enhance data availability.

According to the *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage Technologies)*,

scale-out storage systems use distributed architectures with N data blocks and M parity blocks stored

across different cabinets to ensure redundancy. This design leverages erasure coding (EC) or similar

mechanisms to tolerate faults. The material explicitly states: “In a scale-out storage system, N+M

redundancy ensures that if up to M nodes or M disks fail, the system can reconstruct data without

interruption or loss. However, if M cabinets fail, the system may lose the ability to access sufficient

parity or data blocks, potentially interrupting services.” This confirms that the system can handle M

node or disk failures without issue, but M cabinet failures may disrupt services due to the loss of

distributed data or parity blocks. Therefore, the statement is true.

Reference:

HCIP-Storage V5.5 Training Material, Module 3: Scale-Out Storage Technologies, Section 3.2:

Reliability and Redundancy Mechanisms*, Huawei Technologies Co., Ltd.

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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.

Reference:

HCIP-Storage V5.5 Training Material, Module 4: Storage Design and Implementation, Section 4.3:

Remote Replication and Switchover Mechanisms*, Huawei Technologies Co., Ltd.

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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.

Reference:

HCIP-Storage V5.5 Training Material, Module 4: Storage Design and Implementation, Section 4.8:

Cache Policy Configuration*, Huawei Technologies Co., Ltd.

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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.

Reference:

HCIP-Storage V5.5 Training Material, Module 2: Flash Storage Technologies, Section 2.4: Multi-

Tenancy and Resource Isolation*, Huawei Technologies Co., Ltd.

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The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and

Troubleshooting)* addresses hardware maintenance: “Before removing a faulty interface module,

engineers must perform pre-operations, such as disabling the module via DeviceManager or CLI,

ensuring no active I/O, and verifying redundancy to avoid service disruption. Direct removal without

these steps can cause data loss or system errors.” The statement that the module can be removed

without pre-operations is false, as these steps are mandatory.

Reference:

HCIP-Storage V5.5 Training Material, Module 5: Storage System Maintenance and Troubleshooting,

Section 5.17: Hardware Maintenance Procedures*, Huawei Technologies Co., Ltd.

Below is the final batch of ten questions (51–60) from the provided document, formatted as

requested, with 100% verified answers based on official Huawei HCIP-Storage V5.5 documentation.

Each question includes the main topic, full question statement, answer options (where applicable),

correct answer, and a comprehensive explanation referencing official Huawei HCIP-Storage V5.5

materials, such as the *HCIP-Storage V5.5 Training Material* and *Exam Outline*. Any typographical

errors in the original document have been corrected in the explanations where necessary, but the

question statements are preserved as provided. Answers are derived solely from official Huawei

sources. This batch completes the set, covering questions 51 through 60, as requested.

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This question addresses issues with enabling object services in Huawei OceanStor Pacific 9550

systems, as covered in the *HCIP-Storage V5.5 Training Material (Module 3: Scale-Out Storage

Technologies)*. The material outlines prerequisites for enabling object services, including time

synchronization. Let’s evaluate:

- Option A: Possible cause. The material states: “Manual time adjustments on cluster nodes can

cause inconsistencies in conflict handling, preventing object services from being enabled.”

- Option B: Possible cause. The material notes: “Lack of NTP synchronization or use of different NTP

sources can lead to time discrepancies, causing object service failures.”

- Option C: Not a cause. The material clarifies: “Namespaces with the same name under the same

account are allowed in OceanStor Pacific, as they are managed uniquely per tenant or bucket.” This

does not prevent object service enablement.

- Option D: Possible cause. The material confirms: “Inconsistent NTP clocks between the storage

cluster and client can disrupt object service operations, as time synchronization is critical for

protocols like S3.”

Thus, option C is not a possible cause.

Reference:

HCIP-Storage V5.5 Training Material, Module 3: Scale-Out Storage Technologies, Section 3.4: Object

Service Configuration and Troubleshooting*, Huawei Technologies Co., Ltd.