Figure: Scenario 1: Resource with critical parent faults shows an example of a service group with five resources, of which resource R1 is configured as a critical resource.

When resource R2 faults, the fault is propagated up the dependency tree to resource R1. When the critical resource R1 goes offline, VCS must fault the service group and fail it over elsewhere in the cluster. VCS takes other resources in the service group offline in the order of their dependencies. After taking resources R3, R4, and R5 offline, VCS fails over the service group to another node.