Modify mappings to a host cluster

You can use the management GUI to add or remove mappings to an existing host cluster.

When you change volume mappings in a host cluster, the changes apply to the shared mappings only. For example, when a volume mapping is added to the host cluster, it becomes a shared mapping among all the hosts within the cluster. When a mapping is removed, the volume is removed from the shared mappings for the host cluster. However, you can select specific hosts that retain access to that volume as a private mapping.

Adding volume mappings to a host cluster

To add a mapping to a host cluster with the management GUI, complete these steps:

In the management GUI, select Hosts > Host Clusters.
On the Host Cluster page, select a host cluster and select Actions > Modify Shared Volume Mappings.
On the Modify Mapping page, click Add Volume Mappings.
On the Add Volume Mappings page, select the I/O group to filter the volumes that are displayed by the caching I/O group.
Select a volume from the list of volumes that are displayed.
Assign the SCSI LUN IDs for the selected volume by selecting one of these options:
System Assign

The system assigns the next available SCSI LUN ID to the selected volume automatically.

Self Assign

You can assign SCSI LUN IDs to the volumes manually. If you select an ID that is already in use, the volume cannot be mapped to the host cluster. You must check the next available SCSI LUN ID for each host in the host cluster.
Click Next.
If you selected to assign SCSI LUN IDs manually, enter the SCSI LUN ID for each volume that you are adding to the host cluster. If a volume is already mapped to one of the hosts in the host cluster as a private mapping, and no other hosts in the host cluster use that SCSI ID for that mapping, the SCSI ID cannot be changed.
Click Next.
On the Summary page, verify the changes and select Map Volumes.

Removing volume mappings from a host cluster

When you remove a volume mapping from a host cluster, hosts in that host cluster lose access to that volume, unless you indicate that the volume mapping becomes a private mapping to each host in the host cluster. Hosts in the host cluster will continue to have access to the volumes that remain mapped to the host cluster, and any volumes that have private mappings to the host. To remove a mapping from a host cluster, complete these steps:

In the management GUI, select Hosts > Host Clusters.
On the Host Cluster page, select a host cluster and select Actions > Modify Shared Volume Mappings.
Note: You can also modify shared mappings for host clusters on the Mapping page.
On the Modify Volume Mapping page, select the volume to remove from the host cluster and click Remove Volume Mappings.
If you want the volume mapping to be removed from all hosts in the host cluster, click Continue without selecting any hosts. All hosts in the host cluster lose access to that volume.
If there are specific hosts that you want to retain the mapping to the volume, select those hosts from the list to keep the volume a private mapping. Private mappings apply only to the selected hosts and not the entire cluster. You can also convert all volumes to private mappings by selecting all the hosts that are displayed. Click Continue.
On the Summary page, verify the changes and select Remove Volumes.