HWN021615E WWPNs WWPNs that can not share mappings can not share mappings on storage system Storage system}. There are existing mappings that prevent this.

Explanation

For some devices (e.g. FAStT, HDS) it is not possible to merge existing mappings. That means, if you have volume A mapped to port 1, and volume B mapped to port 2, you will not be able to create any mapping that has both port1 and port2 included.

Action

Create all mappings at once; specify all ports and volumes to be mapped together. OR: Build up mappings beginning with one volume-port mapping, and then add further volumes and ports. For Example, first map volume A and port 1, then volume A and port 2, finally volume B and port1 or port 2. The volume will be mapped to both ports. See also documentation for details.