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Huawei H19-308_V4.0 Exam Syllabus Topics:

TopicDetails
Topic 1
  • Data Storage Basis: Data storage is the foundation of IT infrastructure, enabling efficient storage, management, and retrieval of digital information. Understanding storage fundamentals is essential for selecting solutions that meet business performance, capacity, and reliability requirements.
Topic 2
  • OceanStor Pacific: OceanStor Pacific is Huawei's distributed storage for massive-scale data management and cloud-native applications. It provides scalability, resilience, and performance for big data, AI workloads, and large-scale storage.
Topic 3
  • OceanStor New Hybrid Flash Storage: OceanStor Hybrid Flash combines flash and disk storage to balance performance and cost-effectiveness. This architecture optimizes resources by placing performance-sensitive data on flash and capacity-oriented data on disk.
Topic 4
  • Object Storage Basis: Object storage manages data as discrete units with metadata and unique identifiers for efficient retrieval. This scalable architecture suits unstructured data, cloud applications, and big data analytics requiring massive capacity.

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Huawei HCSA-Presales-Storage V4.0 Sample Questions (Q22-Q27):

NEW QUESTION # 22
What are the major differences between distributed storage and centralized storage?

Answer: A,B,D


NEW QUESTION # 23
2600 V3 supports hot-swappable 12G SAS interface module

Answer: B


NEW QUESTION # 24
What will RAID 6 (7+2) change into after dynamic reconstruction of OceanStor Dorado if one SSD failed in a 9-SSD storage pool?

Answer: A

Explanation:
Huawei OceanStor Dorado utilizes RAID 2.0+ block virtualization technology, which supports Dynamic RAID Reconstruction. In a traditional RAID environment, if a disk fails, the RAID group continues to operate in a "degraded" mode until the disk is replaced. However, in Dorado's RAID 2.0+, the system uses a distributed spare space policy where spare capacity is spread across all disks in the pool.
When one SSD fails in a storage pool originally configured with RAID 6 (7 data chunks + 2 parity chunks), the system identifies that it no longer has enough physical disks to maintain a 7+2 stripe width. To maintain the same level of protection (dual parity) while utilizing the remaining 8 disks, the system dynamically adjusts the RAID policy for new writes and reconstructed data to RAID 6 (6+2). This ensures that the data remains protected by two parity chunks even with a reduced disk count. This "shrinkage" of the stripe width allows the system to remain in a "healthy" protected state rather than staying in "degraded" mode indefinitely.


NEW QUESTION # 25
Which statements are correct about NVMe over Fabrics (NVMe-oF) (RoCE v2)? (Choose all that apply.)

Answer: A,C

Explanation:
NVMe-oF (RoCE v2) uses RDMA technology, which allows direct memory access between storage and servers, greatly improving data transfer speed and reducing latency.
NVMe-oF (RoCE v2) requires lossless Ethernet to reliably transmit data packets, as packet loss would impact performance and data integrity.


NEW QUESTION # 26
What architecture is used by OceanStor Dorado high-end models?

Answer: A

Explanation:
OceanStor Dorado high-end models use the SmartMatrix architecture, which provides high reliability, availability, and performance through advanced controller interconnection and fault tolerance.


NEW QUESTION # 27
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