Defining a Logical Drive-to-LUN Mapping

Related Topics

Important: This option will FAIL if:

Procedure

1

From the Mappings Window, select the Default Host Group, or a host group or host from the Topology View; then, select either the Configure >> Logical Drive-to-LUN Mappings >> Define New Mapping pull-down menu option or Define New Mapping from the right-mouse pop-up menu.

Result: The Define New Mapping dialog is displayed.

The selected node is listed on the dialog in the following form:

If you selected....

Then the selected node label is listed as...

A host group

"Host Group <host group name>"

A host

"Host <host name>"

The Default Host Group

"Default Host Group"

2

Select a single logical drive from the logical drive-to-LUN mapping table. The logical drive-to-LUN mapping table lists the names and unique logical drive identifiers (worldwide name) of the logical drives that are available for definition.

Note: Logical Drives can only participate in one logical drive-to-LUN mapping. Logical Drives that have already been given a specific mapping do not appear in the logical drive-to-LUN mapping table. To change a logical drive-to-LUN mapping, use the Configure >> Logical Drive-to-LUN Mappings >> Change Mapping pull-down menu option. For more information, see "Changing a Logical Drive-to-LUN Mapping."

3

Select a single Logical Unit Number (0 through 31) from the LUN drop-down list box.

Important: The full range of logical unit numbers is displayed because the same LUN can potentially participate in multiple mappings, because each host has its own LUN address space. However, a logical drive can only be mapped to a single LUN and a single host group or host.

4

Select Apply to save the logical drive-to-LUN mapping and leave the dialog open. Select OK to save the logical drive-to-LUN mapping and close the dialog.

Result: The logical drive-to-LUN mapping is saved. The Topology View is updated to reflect any movement of host groups or hosts from the Default Host Group if this was the first specific logical drive-to-LUN mapping defined for the host group or host. The Mappings View is updated to reflect the addition of specific mappings.

Important: When you define a logical drive-to-LUN mapping for a host group or host that is under the Default Host Group, the host group or host will move to the storage subsystem (root) node. This move indicates that the host group or host has a specific logical drive-to-LUN mapping, which means that it can no longer access any logical drive in the Default Host Group.

Examples

When you define a logical drive-to-LUN mapping for a host group or host that is currently under the Default Host Group, the host group or host moves from the Default Host Group to the storage subsystem (root) node indicating that the host group or host has a specific logical drive-to-LUN mapping. Once a specific logical drive-to-LUN mapping is defined for a host group or host, the host group or host no longer has access to the logical drives (if any) in the Default Host Group.

In the example to the left, the host group St. Louis has been defined, but currently does not have any defined hosts, host ports, or specific logical drive-to-LUN mappings.

Therefore, St. Louis is part of the Default Host Group and would automatically access the logical drives (if any) assigned to the Default Host Group.

 

 

In the example to the left, associated hosts and host ports have been defined for the St. Louis host group. Also, a specific logical drive-to-LUN mapping has been defined for the St. Louis host group.

Therefore, the St. Louis host group moves from under the Default Host Group to under the storage subsystem in the Topology View.

Now, each host in the St. Louis host group can access ONLY the logical drives that have been mapped to it.

Related Topics

Learn About Creating Storage Partitions

Using the Mappings Window

Changing a Logical Drive-to-LUN Mapping

Deleting a Host Group, Host, Host Port, or Logical Drive-to-LUN Mapping