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Chapter 2. IBM TotalStorage Enterprise Storage Server configuration 99
Figure 2-26 ESS SCSI adapter with two ports
Figure 2-27 ESS FC adapter with one port
Viewing the association between host ports and ESS ports
In the ESS, we do not tie a host FC port to a Fibre Channel port in the ESS,
which was what we did with the SCSI adapters. Every host FC port within the
Fibre Channel fabric will be identified by its WWPN and can access data through
every ESS FC port unless other measures are taken. We will see later during the
ESS configuration, that we can restrict host FC ports through which ESS FC port
it will be able to access ESS logical volumes.
To show the independence of the port, the selected host FC port is graphically
connected to each ESS FC port, as shown in Figure 2-28. In this example, we
will assume that we already have two host FC ports configured to illustrate this
point.
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