Changing a Logical Drive-to-LUN Mapping

Related Topics

Use this option to change either the assigned Logical Unit Number (LUN) for a logical drive, or the logical drive's associated host group or host.

Procedure

1

From the Defined Mappings View, select a single logical drive. Then, select either the Mappings >> Change >> Mapping pull-down menu option, or Change Mapping from the right-mouse pop-up menu.

Result: The Change Mapping dialog is displayed. The name and unique identifier of the selected logical drive are listed on the dialog.

2

Change the mapping as follows:

If you want to change the...

Then...

Host Group or Host

Select a host group or host from the drop-down list. The list displays the Default Group followed by an alphabetical list of all defined host group or host names in the form Host Group <Host Group Name> or Host <Host Name>. By default, the current host group or host associated with the selected logical drive is displayed.

LUN

Choose a LUN (0 through 31) from the Logical unit number drop-down list. By default, the current LUN associated with the selected logical drive is displayed.

3

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

Result: A confirmation dialog is displayed.

4

Stop any host applications associated with this logical drive and unmount the logical drive if applicable to your operating system.

5

Select Yes to confirm the changes to be made.

Result: The logical drive-to-LUN mapping is checked for validity and saved. The Defined Mappings View is updated to reflect the new mapping. The Topology View is also updated to reflect any movement of host groups or hosts from under the Default Group if the logical drive-to-LUN mapping was changed to a host group or host that did not previously have any specific logical drive-to-LUN mappings.

Important:

  • If you change the assignment for a host group or host that only has one logical drive-to-LUN mapping, the host group or host will move back to the Default Group and inherit any default mappings.
  • If you want to change the last mapping of a host group that also has an associated host with specific mappings, then you must delete or move the host mappings first.

6

Run the host's hot_add utility or a similar utility, then remount the logical drive if required.

Note: If you have changed the mapping for a Secondary Logical Drive , keep in mind that any host(s) that are mapped to this logical drive will be unable to access it until it is promoted to a Primary Logical Drive .

7

Restart the applications.

Related Topics

Learn About Creating Storage Partitions

Learn About Granting Logical Drive Access to Hosts and Host Groups

Using the Storage Partitioning Wizard

Learn About Defining Storage Partition Topology