Backing up the SDR regularly is a good way to insure against the loss of your data. Whenever you change your SP system configuration, use the SDRArchive command to take a snapshot of the SDR contents and save it in a tar file. The PSSP: Command and Technical Reference contains syntax and usage information.
You can restore a saved image of the SDR using the SDRRestore command. Before restoring the SDR, be sure to stop the Resource Manager. (Refer to Chapter 15, Using job switch resource table services.)