What is the proper power-down procedure?

A.
Drive Enclosures, DS3/4/5000 Storage Controller, Hosts

B.
Drive Enclosures, Hosts, DS3/4/5000 Storage Controller

C.
Hosts, Drive Enclosures, DS3/4/5000 Storage Controller

D.
Hosts, DS3/4/5000 Storage Controller, Drive Enclosures