First, I can safely say that the HP SC11Xe's are not going to work with Dell Open Manage Server Administrator (OMSA). You have a couple of options: Boot into the HP controller's BIOS, and configure from there, or use the controller that is in the PE1850(?).
If this was used originally with the PD1850, then the config is more than likely still on that controller.
Past this, you won't be able to configure/manipulate the volumes via OMSA.
I hope that's helpful.