In the HyperMetro dual-live scenario, the storage for Data Center A and the storage group for Data Center B are built as a cross-site cluster. The following description of the cluster which is correct? (Multiple choice)
A. All storage in the cluster provides an application server with no difference in parallel access
B. FC or IP can be used as the communication link between site A and site B in the cluster: The FC link can provide higher transmission efficiency, the IP link is easy to deploy without distance restrictions
C. Dual-active LUN on two storage arrays in a cluster form a virtual dual-active LUcorrect
D. Real-time mirroring keeps real-time data of dual-active member LUN in both data centers in real time
E. In the cluster, the controllers are equal