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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.

Reference:

HCIP-Storage V5.5 Training Material, Module 2: Flash Storage Technologies, Section 2.6: HyperSnap

Configuration and Troubleshooting*, 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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:

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

Troubleshooting)* addresses controller faults in Huawei flash storage systems, such as OceanStor

Dorado: “A faulty controller is a critical issue that requires immediate attention, as it can impact

system performance, redundancy, or availability. Even if the fault is common (e.g., a single controller

failure in a dual-controller setup), emergency handling is necessary to replace the controller and

restore full redundancy to prevent potential service disruptions.” The statement that no emergency

handling is needed is false, as controller faults always warrant prompt action to ensure system

reliability.

Reference:

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

Section 5.18: Controller Fault Handling*, Huawei Technologies Co., Ltd.

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:

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.

Reference:

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

Section 5.15: Cache Management and Optimization*, Huawei Technologies Co., Ltd.

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