8464ch07_Upgrade.fm Draft Document for Review February 7, 2020 3:15 pm 7.4.2 Considerations when adding a cluster to the existing configuration Figure 7-21 shows an example of joining or merging a new cluster to an existing stand-alone  configuration.  Existing  Stand-alone Cluster  Join or  Merge New Cluster  Gigabit LAN/WAN TS7700 Cluster TS7700 Cluster New 2-way Grid Join is used when a new cluster is empty (no logical volumes previously inserted). The joining cluster can be at an equal or higher level of code than the existing cluster. Merge is used when a new cluster contains client data. The merging cluster must be at the exact same level of code as the existing cluster. Figure 7-21 Example of a join or merge of a new cluster 284  IBM TS7700 Release 5.0 Guide