Addition of New Hard Drive in DellPower Edge R740xd

Since the prevailing system was configured with RAID 10, so it is necessary to Add new Hard Drives as Even i.e. you have to add hard drives (Physical) in even numbers means you have to add either 2 or 4 or 6 or 8 or 10 so on. 

Once added, you have to reconfigure RAID by adding these hard drive , note if you does not select hard drive in even number, then it will not proceed.