Make sure that the device you want to use to perform the backup is varied
on. Take option 8 (Work with status) from the Work with Devices (WRKDEVBRM)
command to check the status of your device.
Be sure that the media you use for this backup is enrolled in the SAVSYS
media class.
To begin the backup, type STRBKUBRM CTLGRP(*SYSTEM) SBMJOB(*NO) at any
command line and press Enter.
Once the *SYSTEM backup completes, review the job log to ensure that the
save completed successfully. To display the job log, enter DSPJOBLOG at a
command line, and then press F10 to see the details.