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Starting with IBM Spectrum Virtualize 8.1, host clusters can be added by using the GUI. For more information, see Implementing the IBM System Storage SAN Volume Controller with IBM Spectrum Virtualize V8.2.1 , SG24-7933. 

For GUI users, when you use the Map to Host or Host Cluster  function, it now allows you to let the system assign the SCSI ID for the volume or to manually assign the SCSI ID. For ease of management purposes, it is suggested to use separate ranges of SCSI IDs for hosts and host clusters. 

For example, you can use SCSI IDs 0 - 99 to non-cluster host volumes, and above 100 for the cluster host volumes. When you choose the option System Assign the system automatically assigns the SCSI IDs starting from the first available in the sequence. 

If you choose Self Assign , the system enables you to select the SCSI IDs manually for each volume, and on the right part of the screen it shows the SCSI IDs that are already used by the selected host/host cluster, as shown in Figure 7-1. 

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Note:  Although extra care is always recommended when dealing with hosts, IBM Spectrum Virtualize does not allow you to join a host into a host cluster if it already has a volume mapping with a SCSI ID that also exists in the host cluster, as shown below: 

IBM_FlashSystem:ITSO-FS9100:superuser>addhostclustermember -host ITSO_HOST3 ITSO_CLUSTER1 CMMVC9068E Hosts in the host cluster have conflicting SCSI ID's for their private mappings. IBM_FlashSystem:ITSO-FS9100:superuser> 

