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## One server to a single control path 

Configure one server (mainframe host) to communicate with the library through a single control path. All other servers send requests to that server through a network (as shown in Figure 4-127). This configuration is used by IBM Spectrum Protect. 

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## All servers to a single control path 

Configure all of the servers to communicate with the library through a single, common control path (as shown in Figure 4-128 on page 283). This configuration is used in high-availability environments, such as IBM High Availability Cluster Multi-Processing (IBM HACMP) from IBM, and Systems Management Server and Clustered Server Environments from Microsoft. 

Multi-initiator configurations are supported only by certain adapters and independent software vendors (ISVs). For more information, contact your vendor. 

