Which of the following statements is true.
A) SmartPartition and SmartQoS are mutually exclusive?
B) SmartPartition and SmartQoS can be active in the same system, but not on the same LUN?

• A.Statement A is true and Statement B is false.
• B.Both Statements are true.
• C.Statement A is false and Statement B is true.
• D.Both Statements are false.

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Bank A uses Huawei 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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The LUN size relationship between production storage and disaster recovery storage configuration remote replication is: the capacity of the secondary LUN is greater than or equal to the capacity of the primary LUN.

• A.True
• B.False

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In order to ensure the performance and improve the utilization of the hard disk in Huawei Oceanstor 9000, it is recommended to set the stripe value according to the expected average file size in a directory. Which is the following description of the stripe setting is wrong?

• A.The relationship between redundancy ratio and read and write performance from high to low is: N+l>N+2=N+2:1>N+3:1>N+4
• B.The relationship between stripe size and read and write performance is: 512KB>256KB>128KB>16KB
• C.Only non-empty directories can modify the redundancy ratio
• D.The modified strip size is only effective for the file that was written, and the existing file before the modification still keeps the strip size before the modification

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An engineer needs to perform a snapshot rollback operation to obtain source data at a certain time in the past. Regarding this operation process, which of the following statements are correct? (Multiple choice)

• A.If the data is rolled back to the snapshot at time A, the snapshots created after time A will be deleted
• B.Snapshot rollback is a full copy recovery of the source data at a certain point in time
• C.Snapshot rollback speed can reach the second level
• D.If the data is rolled back to the snapshot at time A, the snapshots created after time A will not be deleted

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