If you wish to have the z10's WWPN appear in the ESS you'll have to get a Linux image up and running first and attempt to configure the non-existant LUN. This can be either an existing image installed on ECKD DASD or the Linux Installation media loaded from the VM RDR.
It's a chicken and egg problem: you need Linux to connect to the ESS so that you can create the LUN to attach to Linux. -- Jay Brenneman