Try Free Huawei H13-624_V5.5 Updated Questions & Answers

Question 1

During flash storage initialization, an administrator needs to change the IP address of a management network port. Which statements about the change are false?

ATo change the IP address of the management network port on the CLI, log in to the CLI and run the 'change system management_ip' command.

BThe IP addresses of the management and maintenance network ports must be in different network segments; otherwise, there will be a route conflict.

CThe administrator needs to apply for and activate a license before changing the IP address of the management network port.

DTo change the IP address of the management network port on the command-line interface (CLI), the IP address of the maintenance terminal and the default IP address of the storage management network port must be in the same network segment if the administrator logs in to the system through a serial port.

Correct answer: A, C

Changing the management network port IP in Huawei flash storage systems is a common initialization task. The *HCIP-Storage V5.5 Training Material (Module 5: Storage System Maintenance and Troubleshooting)* states:

- Option A: False. ''The CLI command to change the management IP is 'change system management_ip_address,' not 'change system management_ip.'''

- Option B: True. ''Management and maintenance network ports must use different network segments to avoid routing conflicts.''

- _Index C: False. ''No license is required to change the management network port IP address; it is a basic configuration task.''

- Option D: True. ''For serial port login, the maintenance terminal's IP and the default management IP must be in the same segment to establish connectivity.''

Thus, options A and C are false.

HCIP-Storage V5.5 Training Material, Module 5: Storage System Maintenance and Troubleshooting, Section 5.4: Network Configuration and Initialization*, Huawei Technologies Co., Ltd.

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Question 2

Which of the following statements are false about direct TCP offload engine (DTOE) 1.0? Select all that apply.

AThis technology uses the polling mode, reducing the latency.

BThis technology allows to directly operate the hardware queue in the user mode, avoiding the context switching overhead.

CHigh latency overhead still exists using the technology, such as kernel mode interrupts, locks, system calls, and thread switching.

DThis technology requires CPU to process each MAC frame, which will consume a large number of CPU resources.

Correct answer: C, D

A is true, so it is not selected.Huawei training material states thatDTOE 1.0 uses polling mode to reduce latency.

B is true, so it is not selected.Huawei training material states that thehardware queue is operated in user mode, which helpsavoid context-switching overhead.

C is false, so it must be selected.The same Huawei material explains that DTOE 1.0 is designed toeliminatetraditional overheads such askernel-mode interrupts, locks, system calls, and thread switching. Therefore, saying that these high-latency overheads still exist is incorrect.

D is false, so it must be selected.Huawei material lists the traditional problem that theCPU must spend great resources processing each MAC frameas a challenge of the conventional approach. DTOE 1.0 addresses this by offloading processing, so saying DTOE 1.0 still requires the CPU to process each MAC frame is incorrect.

Question 3

In Huawei container storage solution, CSI is short for Container Storage Interface. Which of the following statements is false about Huawei CSI?

ACSI Driver developed by Huawei is mainly used to implement the call initiated by sidecar on Huawei storage.

BHuawei storage and Huawei CSI driver need to communicate with each other through RESTful to provide NAS/SAN storage resources.

CCSI Controller runs independently on a worker node on the Pod in StatefulSet mode and is used to interact with the storage and create and delete resources on the storage side.

DCSI Node runs on each worker node of Kubernetes on the Pod in DaemonSet mode and can be used to mount and unmount related storage resources.

Correct answer: C

Option C is false.Huawei's CSI documentation states that theCSI Controller runs independently in a Pod in Deployment mode, notStatefulSet mode. Huawei also says it is used to interact with storage and create/delete resources on the storage side. So the incorrect part is theStatefulSet modedescription.

Option A is true.Huawei explains that Kubernetes sidecar components register and monitor Kubernetes objects andinvoke the CSI Driver when needed, and the Huawei CSI Driver implements those calls on Huawei storage.

Option B is true.Huawei states thatHuawei storage communicates with the Huawei CSI plug-in through RESTfulto provideNAS/SAN storage resource services.

Option D is true.Huawei states that theCSI Node component is deployed in DaemonSet mode on all worker nodesand is used for node-side operations such as mounting and unmounting storage resources.

Question 4

Cache policies and configurations are involved in storage-layer performance optimization of Huawei flash storage. Which of the following statements is false about the high and low watermarks of a cache?

AGenerally, the low watermark for storing dirty data in the cache should not be too low. The recommended value is 20%.

BGenerally, the high watermark of the cache should not be too high, and the difference between the high and low watermarks should not be too small.

CIf the high watermark of the cache is too high, I/O fluctuation and latency increase will occur usually when the current I/O traffic bursts.

DIf the high watermark of the cache is too high, the write performance will be affected. If the low watermark of the cache is too low, the read performance will be affected.

Correct answer: D

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.

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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Question 5

During the use of Huawei flash storage, an engineer wants to calculate the valid write bandwidth of disks. Which of the following formulas can calculate disk valid write bandwidth?

AValid read bandwidth of disks = Read bandwidth of a single disk x Number of disks x (Number of system disks / Total number of disks)

BValid write bandwidth of disks = Write bandwidth of a single disk x Number of disks

CValid write bandwidth of disks = Write bandwidth of a single disk x Number of disks x (Number of data disks / Total number of disks)

DValid write bandwidth of disks = Bandwidth of a single port x Number of ports

Correct answer: C

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.

HCIP-Storage V5.5 Training Material, Module 5: Storage System Maintenance and Troubleshooting, Section 5.12: Disk Bandwidth Calculations*, Huawei Technologies Co., Ltd.

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