In the following RAID levels, if there are 2 hard disk failures in the RAID, which of the following will lost the data? (Multiple choice)

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

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The Persistence layer of Huawei Distributed Storage provides persistent storage capabilities, EC and multiple copies capabilities, and Plog append only access capabilities through PlogClient.

• A.True
• B.False

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LAN-base backup networking is one of the most common networking modes.
Which are advantages of LAN-base backup networking? (Multiple Choice)

• A.Both control data and backup data are transmitted through the service network.
• B.The performance of production hosts is not affected.
• C.The existing network is fully utilized, reducing costs.
• D.The backup performance is good.

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Backup can be regarded as a low-level disaster tolerance. Backup is the basis of disaster tolerance, and disaster tolerance can replace backup.

• A.False
• B.True

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Which of the following is the correct power-on sequence of the Huawei Oceanstor 9000 big data storage system?

• A.Cabinet->Switch->Node->KVM
• B.Cabinet->Node->KM->Switch
• C.Cabinet->Switch->KM->Node
• D.Cabinet->KM->Switch->Node

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