In a database, all small IO requests, the engineer should configure

• A.raid 0
• B.raid 5
• C.raid 3
• D.raid 6

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Which of the following is correct about the NDMP protocol? (Multiple Choice)

• A.Does not support backup disk library
• B.Is an open protocol based on enterprise-level data management
• C.Mainly oriented to the field of data backup and recovery
• D.Support file backup based on CIFS or NFS

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After the all-flash device (for example: Huawei Oceanstor) is configured for remote replication, the slave lun can be set to the p-writable state, which can be done before the master-slave switchover or after the master-slave switchover.

• A.True
• B.False

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An employee of a company did the following in the company's storage system: 9:00 took a snapshot of LUNA and activated it, 10:00 modified all the data of the snapshot LUN and source LUN, and 11:00 rolled back the snapshot.
Which of the following is correct? (Multiple choice)

• A.The data of the source LUN is the modified data at 10:00
• B.After the snapshot is rolled back, the data of the source LUN becomes the data of the modified snapshot LUN at 10:00
• C.The data in the copy space before COW write is 9:00 LUNA data
• D.The data in the copy space before COW write is 10:00 LUNA data

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Which three data centers refers to 3DC in the disaster recovery solution? (Multiple choice)

• A.Production Center
• B.City Disaster Recovery Center
• C.Data Center
• D.Remote disaster recovery center

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