Overview of Disaster Recovery Plan Executions

A Disaster Recovery (DR) plan execution contains all the groups and steps that are contained in the DR plan, along with their execution attributes, such as Error Mode, Timeout, and Enabled/Disabled.

A DR plan execution sequentially executes all the groups in a DR plan in the order in which they are arranged. While the groups execute sequentially, all the steps within each group are executed in parallel. The execution attributes for each group and step are applied during the execution of that group or step.

A precheck performs a comprehensive validation of all the steps in a DR plan and the members associated with those steps. A precheck is a completely passive check and does not alter any part of the DR topology or configuration. The goal of the precheck is to ensure that the DR plan as it is presently constructed does not have any inconsistencies or misconfigured elements which can cause the DR plan execution to fail.

A precheck can be executed independently by itself, known as the stand-alone precheck, or as an immediate precursor to the DR plan execution, known as the built-in precheck. Running stand-alone precheck on a regular basis is highly recommended as it ensures DR readiness. A successful precheck maximizes the probability that the DR plan execution will succeed when launched. Running a built-in precheck in conjunction with a plan execution allows you to validate the plan elements before it begins execution.

Note:

Only one precheck or DR plan execution can be in progress at a time for any given pair of DR protection groups. When a precheck or a DR plan execution is in progress, the DR protection group enters in Updating state and cannot be modified until the operation has completed.