Draft Document for Review December 5, 2019 4:33 pm 8456ch_ConfigGUI.fm Modifying Fibre Channel Port Mask When the host is configured, by default it has access to all fibre channel ports on the  DS8900F system. To view this, select a host from the Hosts window, then select  Properties from the right-click menu displayed to view the window shown in Figure 11-74. If the system administrator wants to restrict the fibre channel ports that can communicate with  the host,  fibre channel port masking  needs to be defined. Modify the fibre channel port mask  to allow or disallow host communication to and from one or more ports on the system.  Figure 11-74 Host properties showing fiber channel port mask To do so, complete the following steps: 1. From the Hosts window, select the host to modify the fibre channel port mask. Right-click,  or from the Actions tab, select  Modify Fibre Channel Port Mask .  2. A list of the DS8900F fibre channel ports is displayed. Select one or more ports to  disallow. You can use the Ctrl or Shift key for multiple selections. Click  Save . See  Figure 11-75. Chapter 11. DS8900F Storage Management GUI  319