About the data switch of OceanStor 18000, the incorrect description is:
A . The PCI-E cable between the data switch and the engine connect one-to-one correspondence strictly, can’t be mixed insertion
B . Engineers only need to connect the data switch and the engine throguh the PCI-E business port
C . The data switch is a dedicated member; engineers can’t use the outsourced PCIe switch to replace the data switch directly
D . Two GE ports of data switch connect with the engine and SVP end to end
Answer: B