In the process of engineers carry out storage array controller replacement operations, which of the following description is wrong?
A . Prior to plug the controller, make sure that the business has stopped or has switched to the peer controller.
B . before change the business to the opposite end controller, be sure to check multipathing software is installed and effective in the system on the host side.
C . confirm whether cahce dirty data has been saved.
D . must process the master/slave controller switchover, so make being replaced controller as back control.
Answer: D