Use the Convert Optical Backup (CVTOPTBKU) command to convert an optical *BACKUP volume to an optical *PRIMARY volume.
You would typically use this function when the *PRIMARY optical volume is either damaged or missing. The conversion eliminates the necessity of copying all information from the optical *BACKUP volume to a new *PRIMARY volume. After the system converts the volume to a *PRIMARY volume, it will allow all write requests to the volume.
Once the system converts an optical *BACKUP volume to a *PRIMARY volume, there is no way to convert it back to an optical *BACKUP volume. To convert backup volumes, select option 6 (Convert optical backup volume) from the Optical Backup/Recovery display or use the CVTOPTBKU CL command.
Before you attempt to convert, you should verify the name of the *PRIMARY volume for which this volume is a backup. You can do this by displaying the volume attributes of the optical *BACKUP volume. You can do this by using the Display Optical Volume Attributes (DSPOPT) command or by selecting option 5 (Display) from the Work with Volumes display.
There may be previously deleted *PRIMARY volume directories and files on the optical *BACKUP volume. Therefore, when converting the optical *BACKUP volume to a *PRIMARY volume, it might be necessary to manually delete directories and files from the volume. You perform this function in order to accurately reflect what was on the *PRIMARY volume. If you never delete directories and files from a *PRIMARY volume, this should not be a concern.