User`s guide

Chapter 2. IBM TotalStorage Enterprise Storage Server configuration 143
For example, we can share volumes between host FC ports. These ports can be
in the same host which uses, for example, the Subsystem Device Driver (SDD),
to increase the bandwidth and availability, or in different hosts, for example, for
clustering. Or, we might want to unassign volumes that were shared before, or
we might want to unassign volumes to keep them unused for later reuse. We
cover all this in the following topics.
2.6.1 Sharing ESS logical volumes between two host FC ports
We click on the Modify Volume Assignments button as shown in Figure 2-88.
Figure 2-88 Entry point for modifying volume assignments
This takes us to the Modify Volume Assignments panel, as shown in Figure 2-89.
Figure 2-89 Four volume assignments, one for each existing volume