ZONERENAME can help you make a duplicate copy of a CSI, such as for backup or test. For example, suppose you have a CSI named SMPE.SYSPROD.CSI containing a target zone named SYSTGT and a DLIB zone named SYSDLB. You plan to install a new release of z/OS®, but before doing so, you want to create a copy of this CSI as backup. The new CSI is to be named SMPE.SYSBKUP.CSI, the copy of SYSTGT is to be called SYSTGTB, and the copy of SYSDLB is to be called SYSDLBB.

Follow these steps to make a backup copy of your CSI:

1. Use access method services (AMS) to define the new CSI data set, named SMPE.SYSBKUP.CSI. Do not initialize this new CSI with GIMZPOOL; you are going to copy an existing CSI data set into it.
2. Use AMS REPRO to copy the original CSI data set, SMPE.SYSPROD.CSI, to the newly defined data set, SMPE.SYSBKUP.CSI.

   At this point, the zones in SMPE.SYSBKUP.CSI still have the same names as the zones in SMPE.SYSPROD.CSI. Unlike the zones in SMPE.SYSPROD.CSI, however, none of the zones in SMPE.SYSBKUP.CSI are defined by GLOBALZONE ZONEINDEX subentries.

3. Use the ZONERENAME command to:
   • Rename the zones in SMPE.SYSBKUP.CSI.
   • Add ZONEINDEX subentries to point to those zones.
   • Update the RELATED zone subentries for the zones in SMPE.SYSBKUP.CSI.
   Here is an example:

   SET      BDY(GLOBAL)        /* Set to global.           */.
   ZONERENAME(SYSTGT)          /* Rename zone SYSTGT       */
            TO(SYSTGTB)        /* to new name SYSTGTB in   */
            NEWDATASET(        /* new CSI data set         */
            SMPE.SYSBKUP.CSI)  /* SMPE.SYSBKUP.CSI.        */
            RELATED(SYSDLBB)   /* Related zone is SYSDLBB. */.
   ZONERENAME(SYSDLB)          /* Rename zone SYSDLB       */
            TO(SYSDLBB)        /* to new name SYSDLBB in   */
            NEWDATASET(        /* new CSI data set         */
            SMPE.SYSBKUP.CSI)  /* SMPE.SYSBKUP.CSI.        */
            RELATED(SYSTGTB)   /* Related zone is SYSTGTB. */.

   After the ZONERENAME operation, all the information about the zones in the old CSI (SMPE.SYSPROD.CSI) remains unchanged, and the following changes have been made for the zones in the new CSI (SMPE.SYSBKUP.CSI):

   • The zones in SMPE.SYSBKUP.CSI have been renamed to SYSTGTB and SYSDLBB.
   • New GLOBALZONE ZONEINDEX subentries point to zones SYSTGTB and SYSDLBB on data set SMPE.SYSBKUP.CSI.
   • The TARGETZONE entry for SYSTGTB indicates that the related DLIB zone is SYSDLBB, and the DLIBZONE entry for SYSDLBB indicates that the related target zone is SYSTGTB.

   Other than the zone definition entries, the content of the renamed zones remain unchanged.

4. Add or change DDDEF entries as appropriate in the SYSTGTB and SYSDLBB zones.