3. The  Modify Host Mappings  window opens (Figure 9-16). Click the  Host  drop-down  menu and select the name of the host to which you want to map volumes. If the volumes  are not highlighted in yellow, select volumes from the Unmapped Volumes pane and click  the double arrow (> > ) to move the volumes to the Volumes Mapped to the Host pane. Click  Map Volumes  or  Apply . Figure 9-16 Modify mapping Dual-node server If you have a ProtecTIER dual-node server, after the repository is built on the second node,  you must select the other node and proceed with the volume mapping again. You might  receive a warning that states that the specific volume is already mapped (Figure 9-17). Verify  that the mapping is correct and continue. Figure 9-17 Volume mapping warning Chapter 9. IBM Storwize Family and SAN Volume Controller  141