To schedule a backup control group that uses the special value *SAVSYS, use the Start Backup using BRM (STRBKUBRM) command. Specify a schedule time you want the backup to begin on the SCDTIME parameter, and specify *NO on the SBMJOB parameter. You should be aware that after submitting the STRBKUBRM from the console, the console will be unavailable until the backup has completed. It is also very important to ensure that messages being sent to the console do not interrupt the STRBKUBRM command that has been submitted. To prevent the interruption by messages to the console, specify the following Change Message Queue (CHGMSGQ) command prior to submitting the STRBKUBRM command or in the backup control group that you are using:
CHGMSGQ MSGQ(QSYSOPR) DLVRY(*NOTIFY) SEV(99)