A MD1200 is a simple JBOD and not a RAID Array. If you have a H820|H830 in your Server than its a standard PERC with external ports for connecting the MD.  So press ctrl-d or p during boot and vipe existing config or deleting the existing VD and create a new one.

If you only have a 6G SAS which is only good for connecting the MD you need to use software raid within your linux OS like mdraid or what ever.

I have this: 

List adapters - Executing command..
 Adapter#              ProductName                SAS WWID        FW. Rev
 --------              -----------                --------        -------
        0               PERC H200I        5d4ae520b6ff7000        7.15.08
        1        PERC H800 Adapter        500c04f2e0ddb53f   12.10.7-0001

So the RAID is the PERC adapter, that I can configure at book... did I understand correctly?

Yes... the PERC H800 is the one youre looking for.  Just reboot the Server and than looking... its ctrl+d or p (cant remember), select the right HBA and than configure it.