Adding mappings to host clusters

You can use the management GUI or the CLI to add mappings to a 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.

Using the management GUI

To add a mapping to a host cluster with the management GUI, complete these steps:
  1. In the management GUI, select Hosts > Host Clusters.
  2. On the Host Cluster page, select a host cluster and select Actions > Modify Shared Volume Mappings.
  3. On the Modify Mapping page, click Add Volume Mappings.
  4. On the Add Volume Mappings page, select the I/O group to filter the volumes that are displayed by the caching I/O group.
  5. Select a volume from the list of volumes that are displayed.
  6. 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.
  7. Click Next.
  8. 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.
  9. Click Next.
  10. On the Summary page, verify the changes and select Map Volumes.

Using the command-line interface

To add a volume mapping to a host cluster with the SCSI LUN ID assigned automatically, enter the following command:
mkvolumehostclustermap -hostcluster host_cluster_id_or_name volume_name_or_id
where host_cluster_id_or_name is the ID or name of the host cluster and volume_name_or_id is the name or ID of the volume that is being mapped to the host cluster.
To add a volume mapping to a specific SCSI LUN ID, enter the following command:
mkvolumehostclustermap -scsi scsi_num_arg -hostcluster host_cluster_id_or_name volume_name_or_id
where scsi_num_arg is the SCSI LUN ID that you want to assign to the volume mapping, host_cluster_id_or_name is the ID or name of the host cluster, and volume_name_or_id is the name or ID of the volume that is being mapped to the host cluster.
Parent topic: Managing host clusters