HP XP Command View Advanced Edition Software - Manual (Page 71)

About LUN path management
When you allocate a volume to a host, HP StorageWorks P9000 Command View Advanced Edition
Suite allows you to assign or edit LUN paths between one or more volumes and one or more hosts.
LUN paths provide volume access for the host by pairing storage ports and host ports. For example,
one or more storage ports can be mapped to one or more host ports (host bus adapters (HBAs)).
After volumes have been allocated to a host, you can edit existing LUN path information to add new
paths and/or delete existing paths from a list of allocated volumes in the Storage Systems tree, Hosts
tree, Logical Groups tree, and from a list of volumes returned from a search.
When initially allocating volumes and setting LUN paths, or editing LUN paths later, WWN nickname
information can be displayed to confirm the host port (HBA). Please note the following conditions for
displaying WWN nicknames:
• WWN nicknames become visible when storage system information is refreshed. If WWN nicknames
are updated on the storage system, another refresh is needed to ensure the latest information.
Refreshing host information, including host names and WWNs, does not update storage system
WWN nicknames in HP StorageWorks P9000 Command View Advanced Edition Suite.
• If several WWN nicknames (for example, as set on different storage systems) exist for a host HBA,
only one of the nicknames is displayed for that HBA.
• In addition to the edit LUN paths dialog, WWN nicknames are displayed in the LUN paths panel
during volume allocation, the LUN paths information panel during volume unallocation, and the
Volumes panel on the Resources tab.
Because allocated volumes belong to a specific host group, the same target host port is set for all
volumes in any given host group. Therefore, when adding or deleting a host port for one or more
volumes, you must select all of the volumes in that host group to maintain consistent LUN path
assignments for all volumes.
Editing LUN paths
You can add and delete LUN paths between storage systems and hosts.
1. On the Resources tab, expand the storage, hosts, or logical group trees to display volumes.
2. Select one or more volumes for which you want to edit LUN paths. Selected volumes should belong
to the same host group, and the host group should belong to a single storage system.
3. From your current tree click Edit LUN Paths, or click More Actions and select Edit LUN Paths to
display the Edit LUN Paths dialog box.
4. Use the graph or table view to map storage ports to host ports. In both views, you can use links
to view WWN nickname information to confirm the target host bus adapter (HBA).
a. In graph view, click on a storage port row to add it to the LUN Path Editor panel. Connect
the line to the target HBA. Another line is displayed, which you can connect to another HBA
or discard with a click.
b. In table view, select a storage port, then a host port row, then click Add to move the mapping
to Selected host Ports panel.
Note that if you add an incorrect mapping you can delete it by clicking on the connector line in
graph view, or using the remove button in table view, or you can cancel the dialog and start
over.
5. To delete an existing in use path as indicated by a green line in graph view, or by the 'In Use'
state in table view, do the following:
a. In graph view, click the green line. The line will now be gray and thin.
User Guide 71