BRMS performs actions before processing the control group entries, process control group entries sequentially, and process additional actions after the control group entries are processed. In general, BRMS will process each control group entry sequential and make every effort to process all entries. However, if a failure occurs on a save entry the control group may end without further processing depending on the type of error.
If the error is an unrecoverable device or media error, the control group will be ended.
If the error encountered is less severe, such as an object is locked and the object cannot be saved, the backup will continue but the process will end with exception BRM1820 — Control group &1 type &2 ended abnormally.
The following outlines the general order in which backup control group actions are performed.