You can create a CLI script file of your RecoverPoint config with the save_settings command (run as admin) and later run it after you have configured your new repository volume.  Please note, though, that this does not save your security settings (i.e. custom users and groups you might have configured).  Also, if you change your repository volume, you will have to reactivate your license since the installation id and, thus, the activation key are (partially) based on the id of the repository volume.  For that reason, it might be useful that you also run save_account_settings so to have your account id and license key handy to request the new activation key.  After you save your settings, you should in sequence: 
Hi,  I want to remove my  current repository volume and want to use repository lun from other Array.  If I do that whole my current configuration will be erased that I don't want. So is there any way to export the configuration and again import it in RPA?  Any suggestion would be a great help.   Thanks,
How to export/import Configuration in RecoverPoint ?