Which of the following storage nodes are equipped with one SSD by default as the read cache? (Multiple Choice)

• A.P12
• B.C72
• C.P25
• D.C36

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After launching Oceanstor 9000 deployment, the deployment tool interface prompts "connection unsuccessful". What are the possible reasons? (Multiple choice)

• A.The deployment tool and deploy version do not match
• B.The deploy process does not exist
• C.Unstable network connection between nodes

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A company purchased a set of Huawei horizontally extended file storage for the video surveillance system, enabled the read and write fault tolerance mode of the InfoRevive feature to provide data fault tolerance, and configured the EC's data protection level to 4+1. If two copies of data are invalid, how does the InfoRevive feature ensure business continuity and availability? (Multiple choice)

• A.For the read operation, the system only successfully read 3 copies, and returns 3 copies of the data that were successfully read, and the 2 copies that failed to be read are restored by verifying the data.
• B.For the write operation, only 3 copies return a write success response, and the 2 copies that fail to write are all filled with 0, and the write success is performed according to the segmentation.
• C.For the read operation, the system only successfully read 3 copies, and returns 3 copies of data that were successfully read, and the 2 copies that failed to read will be returned after adding zeros.
• D.For the write operation, only 3 copies return a write success response, and the 2 copies that fail to write are no longer filled with 0, and they are processed according to the striped write success.

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In Oceanstor 9000, the application of which of the following components requires license support.

• A.Unified network management
• B.Unified view
• C.NDMP backup
• D.Infoplicator

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Regarding the scenario of the small I0 write cache in Huawei's distributed storage multi-level cache technology, which of the following is the correct order?
① Enter the WAL log area based on the SSD buffer disk, and return to the host to complete the write operation
② When the memory write cache reaches a certain water level, the data starts to be flushed down
③ Data writing based on RAM Write Cache
④ The small IO will be written to the SSD cache of the node first, and then written to the HDD after being aggregated into a large IO

• A.①②③④
• B.③②①④
• C.③④①②
• D.③①②④

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