Huawei's hyper-converged storage has multiple data security assurance mechanisms. Which of the following statements is correct? (Multiple choice)

• A.PCle SSD Cache technology ensures that data will not be lost after power failure
• B.Support a variety of EC (Erasure Code) with different ratios
• C.According to the security level, 2 copies or 3 copies can be flexibly configured
• D.Support storage dual-active and asynchronous replication capabilities, and provide cross-site data redundancy protection

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OceanStor CloudService is a professional remote maintenance system that monitors customer's device alarms around the clock.

• A.FALSE
• B.TRUE

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In the Oceanstor 9000 storage system, the Info Allocator hard quotas for directory A and its sub-directory B are set to 1GB and 2GB respectively. Which of the following statements is correct? (Multiple choice)

• A.The maximum writeable data of directory A is 1GB
• B.The maximum writeable data of directory B is 2GB
• C.The maximum writeable data of directory A is 2GB
• D.The maximum writeable data of directory B is 1GB

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In the Huawei storage system, which of the following statements about rolling back HyperCDP are correct? (Multiple choice)

• A.In order to ensure data consistency, the host business needs to be suspended before HyperCDP is rolled back
• B.HyperCDP needs to be in the active state to perform the rollback operation
• C.When the source LUN of HyperCDP is also the primary LUN or the secondary LUN of remote replication, the HyperCDP rollback operation can only be performed after the remote replication pair status becomes "split"
• D.For a source LUN with multiple HyperCDPs, multiple HyperCDP rollback operations can be performed at the same time

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What are cloud storage's disadvantages when it serves as backup media?

• A.A high-bandwidth network is required.
• B.Backup media require management.
• C.Cloud storage is difficult to deploy.
• D.Capacity is difficult to expand.

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