    These are all possible. 
We have a PowerEdge R710 running a RAID1/RAID5 configuration. The server is running VMware ESXi v5.0.0. We've nearly maxed out storage so I need to add storage. I'm not sure what options I have to do this. These are the options I hope are possible. Can the PERC6/i controller support another RAID5? 
Adding Drives to PowerEdge R710 RAID