Which of the Following Statements About Multi-Planar System Design of Huawei

Which of the following statements about multi-planar system design of Huawei Oceanstor unified storage system is correct?

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