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Which of the following scenarios do not support homogeneous online migration based on heterogeneous virtualization features?

• A. The source storage is S5500T and the host comes with multipath use SCSI reserved cluster scenario.
• B. The source storage is S5500 and the host operating system type is Solaris.
• C. Huawei self-developed multipath with the source storage is S5500 and the host installed V1R8C20
• D. Huawei self-developed multipath with the source storage is S5500T and the host installed V1R8C20

The following statement about OceanStor V3 LUN copy and clone, which is wrong? (Multiple Choice)

• A. LUN copy and clone can be incrementally synchronized
• B. LUN copy and cloning backup the original volume data when it initiates to perform operations (or start)
• C. when carring out LUN copy and clone, all need to stop hosting business
• D. LUN copy and clone can be performed in the same array

If the hard disk or node of the OceanStor 9000 device fails or goes offline, some members of the system are in a degraded state (EC redundancy protection state), and the newly written data is also in a degraded state. When the faulty or offline hard disk or node is normal, the redundant data is saved according to the EC algorithm to ensure the reliability of the data.

• A. True
• B. False

Which of the following description about the arbiter server model for HyperMetro is correct? (Multiple choice)

• A. In the mode of arbitration server, if a site has the priority to obtain the request of arbitration, it is also possible to configure the site priority. The priority array side has the priority of arbitration wins and the heart interrupt but otherwise normal, the priority array will get the arbitration victory.
• B. Arbitration server failure, the business will continue to operate normally.
• C. The arbitration server is proposed to be deployed in a data center where the storage performance is better. When arbitration is needed, high-performance storage can win more easily and continue to provide services.
• D. Double live domain contains array A and array B, arbitration server. If both Array A and the arbiter fail at the same time, Array B survives to provide service.

The following description of OceanStor SNS series fiber switch, which is correct? (Multiple choice)

• A. Each OceanStor SNS switch has four 10Gbps stacking ports enabled at the factory.
• B. OceanStor SNS switch provides free Trunking function. Once a port fails, it automatically withdraws the failed port from the Trunking group and reallocates the traffic of each Trunking port to achieve system fault tolerance.
• C. Trunking adopts "Switch-on-exchange" design, which supports intelligent path selection. Automatic switching mainly refer to the following two principles: speed and curtain.
• D. Whe 10Gbps stacking ports can't meet the increasing service needs of customers, four 10 Gbps stacking ports can be activated to 20Gbps through License (smooth upgrade without service interruption)