Practice Free H19-308_V4.0-ENU Exam Online Questions
Which RAID level cannot provide data redundancy protection?
- A . RAID 5
- B . RAID 0
- C . RAID 6
- D . RAID 1
Which of the following operations are recorded in NAS audit logs?
- A . File opening
- B . File deletion
- C . File modification
- D . File renaming
What are the main application scenarios for SAN storage?
- A . Big data storage
- B . Database
- C . Mass file sharing
- D . VMware virtualization
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
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.
What technologies can be used to migrate data from the existing storage devices of other vendors on the customer’s live network to target Huawei storage devices?
- A . Heterogeneous storage virtualization
- B . Data migration
- C . Storage tiering
- D . Level-2 cache (SSD cache)
Which of the following new concepts is proposed by Huawei for data backup solutions?
- A . D2F2T
- B . D2D2T
- C . F2F2T
- D . F2F2X
Which of the following features is used to improve the performance of the new-gen OceanStor hybrid flash storage?
- A . SmartCache
- B . SmartDedupe
- C . SmartAcceleration
- D . SmartTier
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 6 (6+2)
- B . RAID 5 (5+1)
- C . RAID 6 (7+1)
- D . RAID 6 (5+2)
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.
Which statements about high performance guarantee of OceanStor Dorado are correct?
- A . The end-to-end NVMe architecture enables direct connection between SSDs and CPUs, greatly improving read and write efficiency.
- B . The FlashLink intelligent algorithm is used, enabling disk-controller collaboration to improve data read/write and reconstruction efficiency.
- C . With the native all-flash architecture, performance does not deteriorate much when deduplication, compression, and snapshot functions are enabled.
- D . File systems and LUNs are fully balanced. A single LUN or file system maximizes performance of all controllers.
Which of the following data tiering capabilities are provided by OceanStor Pacific?
- A . Nearline archiving: data tiering to object storage from a production/backup system
- B . Intra-cluster tiering of a production/backup system
- C . Offline archiving: data tiering to Blu-ray storage from nearline archiving storage
- D . Data tiering to cloud from nearline archiving storage