The data format before and after the backup is the same, and the backup data can be directly used to restore production data to ensure the continuity of business read and write.

• A.True
• B.False

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Huawei's hyper-converged storage uses a distributed hash algorithm, which of the following processes occur on the server side? (Multiple choice)

• A.Hash calculation Partition
• B.Write cache
• C.Partition mapping OSD
• D.Map the location on the disk

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When restarting an OceanStor V3 engine, we should:

• A.Make sure a second device can take over all services.
• B.Make sure no service is running on any of the controllers.
• C.Make sure the power is off.
• D.Make sure all disks are powered off.

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Bank A uses Huawei's all-flash storage to carry its key services. Which of the following can provide data reliability assurance? (Multiple choice)

• A.Double mapping of catalog metadata to realize business data logic redundancy
• B.Local snapshots to achieve business data redundancy
• C.Active-active, replication, backup to achieve data redundancy between sites
• D.RAID 2.0+, multiple copies, to achieve local physical data redundancy

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Which of the following statements about the working principles of data deduplication is false?

• A.Dab blocks that have been stored will not be stored again, and no other processing is required either, such as adding indexes.
• B.A complete data logical view can be seen through indexes.
• C.The same data block will be physically stored only once.
• D.The granularity of hash comparison is data block.

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