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Huawei HCSA-Presales-Storage V4.0 Sample Questions (Q337-Q342):

NEW QUESTION # 337
What are the components of a SAN system? (Choose all that apply.)

A. Network layer
B. Host layer
C. Physical layer
D. Storage layer

Answer: A,B,D

Explanation:
Storage layer: Includes storage devices and arrays that store the data.
Network layer: Consists of switches and interconnects that facilitate data transfer between storage and hosts.
Host layer: Represents the servers or hosts that access the storage.

NEW QUESTION # 338
With adaptive data locality rearrangement on writes, the data dispersion is calculated in real time when backup data is written and data distribution on disks is adjusted. During backup data recovery, only a few sequential reads are required, improving HDD recovery performance.

A. TRUE
B. FALSE

Answer: A

Explanation:
The statement accurately describes Huawei's Adaptive Data Locality Rearrangement technology used in OceanProtect systems. Backup data is often deduplicated and compressed, which traditionally leads to high data fragmentation (dispersion) across physical disks. When it comes time to recover that data, the disk heads on an HDD would normally have to perform thousands of "seek" operations to find the scattered blocks, resulting in very slow recovery speeds.
Huawei solves this by calculating the data dispersion in real-time during the write process. The system intelligently rearranges and groups related data blocks together on the disk media. Because the data is stored in a physically optimized, sequential manner, the recovery process can utilize sequential reads rather than random reads. This allows OceanProtect to deliver recovery performance that is significantly higher than traditional backup appliances, ensuring that businesses can restore services rapidly after an outage or data loss event.

NEW QUESTION # 339
Which of the following is the maximum performance (IOPS@SPC-l) that OceanStor V5 can achieve?

A. 4 Million IOPS@lms
B. 6 Million IOPS@lms
C. 3 Million IOPS@lms

Answer: B

NEW QUESTION # 340
What will RAID 6 (7+2) change into after dynamic reconstruction of OceanStor Dorado if one SSD failed in a 9-SSD storage pool?

A. RAID 5 (5+1)
B. RAID 6 (6+2)
C. RAID 6 (5+2)
D. RAID 6 (7+1)

Answer: B

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 # 341
Which of the following functions is NOT supported by the OceanStor F V5?

A. Tiered storage
B. Unified storage
C. HyperMetro (NAS)
D. Deduplication and compression

Answer: A

NEW QUESTION # 342
......

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