Administrator Guide
• Default Group
• Undefined mappings node
• Individual defined mapping
• Host group
• Host
3. From the menu bar, select Host Mappings > LUN Mapping > Add.
The Define Additional Mapping window is displayed.
4. In Host group or host, select the appropriate host group or host.
All defined hosts, host groups, and the default group are displayed in the list.
NOTE: When configuring an iSCSI storage array, if a host or a host group is selected that does not have a SAS host
bus adapter (SAS HBA) host port defined, a warning dialog is displayed.
5. In Logical unit number, select a LUN.
The supported LUNs are 0 through 255.
6. Select the virtual disk to be mapped in the Virtual Disk area.
The Virtual Disk area lists the names and capacity of the virtual disks that are available for mapping based on the selected host group
or selected host.
7. Click Add.
NOTE: The Add button is inactive until a host group or host, LUN, and virtual disk are selected.
8. To define additional mappings, repeat step 4 through step 7.
NOTE: After a virtual disk has been mapped once, it is no longer available in the Virtual Disk area.
9. Click Close.
The mappings are saved. The object tree and the Defined Mappings pane in the Host Mappings tab are updated to reflect the
mappings.
Modifying and removing host-to-virtual disk mapping
You can modify or remove a host-to-virtual disk mapping for several reasons, such as an incorrect mapping or reconfiguration of the
storage array. Modifying or removing a host-to-virtual disk mapping applies to both hosts and host groups.
CAUTION:
Before you modify or remove a host-to-virtual disk mapping, stop any data access (I/O) to the virtual disks
to prevent data loss.
To modify or remove host to virtual disk mapping:
1. In the AMW, select the Host Mappings tab.
2. In the Defined Mappings pane, perform one of these actions:
• Select a single virtual disk, and select Host Mappings > LUN Mapping > Change.
• Right-click the virtual disk, and select Change from the pop-up menu.
3. In the Host group or host list, select the appropriate host group or host.
By default, the drop-down list shows the current host group or the host associated with the selected virtual disk.
4. In Logical unit number, select the appropriate LUN.
The drop down list shows only the currently available LUNs that are associated with the selected virtual disk.
5. Click OK.
NOTE:
Stop any host applications associated with this virtual disk, and unmount the virtual disk, if applicable, from
your operating system.
6. In the Change Mapping dialog, click Yes to confirm the changes.
The mapping is checked for validity and is saved. The Defined Mappings pane is updated to reflect the new mapping. The object tree
is also updated to reflect any movement of host groups or hosts.
7. If a password is set on the storage array, the Enter Password dialog is displayed. Type the current password for the storage array,
and click OK.
8. If configuring a Linux host, run the rescan_dm_devs utility on the host, and remount the virtual disk if required.
NOTE: This utility is installed on the host as part of the MD Storage Manager install process.
9. Restart the host applications.
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Disk groups, standard virtual disks, and thin virtual disks