Before you begin: Use the BACKUP(DSS) option on a concurrent copy capable device to enable DFSMSrmm to continue to process requests while the backup is taken.

Perform these steps to move your control data set and journal to a different device.

1. With DFSMSrmm active, back up both the control data set and the journal.
   Example: Run EDGHSKP,PARM='BACKUP(DSS)' to back up the control data set and the journal and to clear the current journal. Use the BACKUP(DSS) option on a concurrent copy capable device to enable DFSMSrmm to continue processing requests while the backup is taken. DFSMSrmm might write some records to the journal if any updates are made to the control data set before the DFSMSrmm procedure is stopped. This is not a problem as the restore operation will use them in forward recovery.

   //EXEC PGM=EDGHSKP,PARM='BACKUP(DSS)'
   //MESSAGE DD DISP=SHR,DSN=messages
   //SYSPRINT DD SYSOUT=*
   //BACKUP DD DISP=(,CATLG),DSN=cds backup(+1),UNIT=SYSALLDA
   //JRNLBKUP DD DISP=(,CATLG),DSN=journal backup(+1),UNIT=SYSALLDA

2. Stop or quiesce the DFSMSrmm procedure to prevent any further updates to the control data set during recovery.
3. Restore the backup of the control data set to the new control data set. If the BACKUP(DSS) option is used, you can use the DSSOPT DD statement to specify the new control data set data set name. This puts the latest DFSMSrmm information into the new control data set and uses the old journal to forward recover the control data set backup to the point when the you stopped the DFSMSrmm procedure.
   This JCL example restores the back up to a different device using a new data set name:

   //MOVECDS EXEC PGM=EDGBKUP,PARM='RESTORE'
   //SYSPRINT DD SYSOUT=*
   //DSSOPT DD *
      RENAMEU(*.CDS,*.NEWCDS) OUTDYNAM(SHRPK2) NULLSTORCLAS BYPASSACS(*)
   //BACKUP DD DISP=SHR,DSN=cds_backup(0)
   //JOURNAL DD DISP=SHR,DSN=journal_backup(0)
   //        DD DISP=SHR,DSN=old_journal

4. Implement the new data sets by using one of these techniques:
   • Use IDCAMS ALTER command to rename the new control data set and journal after you rename the old data sets.
   • Create a new EDGRMMxx parmlib member with the new journal names and control data set names.
   • Update the current parmlib member to include the names of the new control data set and journal.
5. If you stopped DFSMSrmm, start the DFSMSrmm procedure, using the updated parmlib member or the new parmlib member. If you quiesced DFSMSrmm, use the MODIFY command to specify the parmlib member suffix to be used.

   If you are keeping multiple control data set and journal backups for error recovery situations, perform step 1 again to backup the control data set and journal.

   Recommendation: Back up the new data sets now to avoid the requirement to keep the old journal for recovery. As your backup copies are created in the future, your requirement for the old journal will be eliminated.

You are done when you have successfully moved the control data set and journal.