Emulex 3.4 user manual LUN Masking tab with LUN Masking Disabled

Masking and Unmasking LUNs (Windows, Solaris LPFC and Solaris emlxs (SFS))

LUN masking refers to whether or not a LUN is visible to the operating system. A LUN that has been masked is not available and is not visible to the OS. You can use HBAnyware to mask or unmask LUNs at the host level.

Note: In Solaris systems, the Emulex LPFC drivers support both a target level and HBA level LUN unmasking override feature. If either of these driver-specific overrides are enabled, the HBAnyware utility will not permit you to configure LUN masking. In this case you must change the LUN masking level to the correct level from the LUN masking tab before you can mask or unmask LUNs (see Figure 21).

Figure 21: LUN Masking tab with LUN Masking Disabled

LUN Masking Conventions and Guidelines

LUN icons in the discovery-tree reflect the live mask state currently in use by the driver. Green LUN icons indicate unmasked LUNs. Grey LUN icons indicate masked LUNs. Red text indicates that a LUN mask has been changed, but not applied (saved).

LUN Masking Column Definitions

•LUN – The FC LUN number.

•On Reboot – The 'On Reboot' column shows the mask configuration currently saved to the configuration file on disk (Solaris LPFC and Solaris emlxs (SFS)) or to the Registry (Windows). Normally, for a specific LUN, the states reported in the 'On Reboot' and 'Current' column will be identical. However, there may be times where these do not match. For example, the hbacmd tool may be used to change only the 'Current' mask state for a LUN and not touch the 'On Reboot' mask state contained in the configuration file.

•Current – The 'Current' column displays the live mask state currently in use by the driver. When you first see the LUN Masking tab, the mask states displayed in the 'Current' column are identical to the mask states for the corresponding LUNs in the discovery-tree.

The HBAnyware Utility User Manual Page 34