All ports of a host lose access to the volume
This problem occurs with SAN Volume Controller.
Problem
Unassigning one or more ports of a host unassigns all ports of the host.
If you use the SAN Volume Controller user interface or theSAN Volume Controller CLI to create a host that has several ports, and then unassign one or more ports of a host using IBM Spectrum® Control, all ports of the host will lose access to the volume.
Action
Do not create hosts with several ports.