Hello XinXiaGeng,
This article describes the difference between Physical (passthrough) and Virtual (non-passthrough) RDMs which it would appear is what you asked:
Bob
I do not know how to build pass-thru RDM and non-pass-thru RDM storage array.
There's no difference for both modes on the storage side. What makes the difference is the option, which you select, when you add the LUN as an RDM to a virtual machine.
André