Which If the Following Is Correct Regarding the Huawei Oceanstor

Which if the following is correct regarding the Huawei Oceanstor unified storage system multi-planar system design?

A) The service plane uses GE channels for data transmission
B) The service plane connects the host IO channel, disk IO channel and GE switch
C) Plane redundancy between each other, when the business plane fails, allowing the use of control plane transmission of business data
D) When the GE switching channel is faulty, the PCIe switching channel can be used as the backup data transmission channel