An administrator has just upgraded a server from non-hot plug storage to all hot plug storage. Theadministrator powers up the server， during POST the RAID controller is recognized but none of the drivelights flash. 
Which of the following should the administrator do FIRST to trouble shoot the problem？（）

A. Check the backplane cabling.
B. Check the server BIOS.
C. Update the RAID controller firmware.
D. Install the latest hard drive firmware.