IBM System Storage N Series Implementation Manual page 51

Note
If you are using the Multipath Storage feature to connect disk shelves to the
gateway, you must configure the environment
fc-non-array-adapter-list
variable before you connect the first disk shelf on a new loop. See Appendix B,
"Setting up and Managing Multipath Storage," on page 65 for more information.
Chapter 4: Adding a New Disk Shelf to a Gateway 37