Two-node shared disk topology

This cluster uses a two-node shared disk topology. It includes a primary and secondary node. The primary node hosts the Tivoli® Storage Manager server, database, Tivoli Storage Manager instance, and the data. The secondary node is where the Tivoli Storage Manager resources are moved to if a failure occurs.

The two nodes in this cluster are connected to each other over a single public network and wired to a shared disk storage system, which is always available. Shared disk storage is where one or more disks are available to both the primary and secondary nodes. These disks are only mounted to one node, the primary node, at any one time. One node can input and output data to the shared storage disks. The following illustration shows a two-node shared topology where automatic failover to the secondary node occurs in the instance of a failure.