CPYOPT requirements to volume type *PRIMARY

When the target volume is type *PRIMARY, the CPYOPT command has the following unique requirements:

• The source volume can be either type *PRIMARY or *BACKUP.
• Because the target volume is *PRIMARY, all API requests and most optical commands and utilities can access the volume.
• Because utilities and user programs can update the *PRIMARY volume, you need to determine how to protect directories and files from unauthorized change or deletion.
• The target volume could contain information for one or multiple optical *PRIMARY volumes. An easy way to manage multiple volumes on a single target volume would be to have a new first level directory. That directory name could be the name of the source-primary volume.
• You need a way of keeping track of when a volume or directory was last backed up. Use the CPYOPT command to do it automatically.
• The hierarchical structure on the target volume does not need to be identical to that of the optical *PRIMARY volume.
• The create date and time, and change date and time, of the file on the target volume will be different than their counterparts on the optical primary volume. The file creation data and time on the target volume is the date that the file was written.
• You can use directories and files on the target *PRIMARY volume directly. You do not have to copy applications back to a *PRIMARY optical volume.
• You can request that the system copy only new files on the source volume to the target volume. This might be useful if you never changes files on your source volume but only create new ones.