If you are connecting to an iSCSI target that already has NSS partitions and pools created on it, you might not be able to access those NSS partitions and pools until you reboot the Linux initiator server. This is required for each Linux initiator server that will access the iSCSI target.
For instructions on configuring an OES 11 or later server as an iSCSI initiator and connecting to an iSCSI target, go to Mass Storage over IP Networks--iSCSI
in the SLES 12 Storage Administration Guide.