Which of the following statements about SDS software-defined storage and traditional storage in terms of storage system software is wrong?

Which of the following statements about SDS software-defined storage and traditional storage in terms of storage system software is wrong?
A . The storage software architecture of SDS needs to be involved from top to bottom, APP-vDisks-Container Storage Pool-HDD
B . The storage software architecture of SDS manages storage based on applications. Applications first need to create their own storage policies, that is, the storage requirements of the application, and then add storage bodies (such as vDisks) to the storage policies. The collection of all user storage entities (vDisks) in a policy is called a Storage Pool.
C . Traditional storage is mostly a bottom-up design model, HDD->DISKGroup->RAID->Storage Pool->LUN
D . In traditional storage system design, LUN is the basic unit of storage management. Before users create LUNs, the storage has already been defined by the manufacturer or administrator and has always existed in the storage system. For user LUNs, users can only define very limited things.

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Answer: B