Draft Document for Review February 7, 2020 3:15 pm 8464ch14_DisasterRecoveryTesting.fm 4. On each DR cluster, ensure that the Management Classes that will be used by the DR  volumes on the DR hosts do not make copies to other clusters in the grid when the DR  volumes are written to. If wanted, define a new Management Class on the DR clusters to  be used specifically for DR testing. On each DR cluster, set the Copy Mode for the  Management Class used to No Copy for each non-DR cluster by selecting  Constructs Management Classes . 5. Restart the DR host and restore the DR environment from the production environment. 6. By using the unique categories that were chosen in Step 1, define these MEDIA1,  MEDIA2, ERROR, and PRIVATE categories in the DEVSUPxx member on the DR hosts.  These categories are used by volumes that were created for use by the DR host during the  DR test.  After the categories are defined, IPL the DR host to ensure that the categories are used.  Alternatively, the  DS QL,CATS  command can be used to dynamically set the categories  without an IPL. If this alternative is used, be sure to update the DEVSUPxx as well with the  new categories so that the categories continue to be used if an IPL occurs.  7. Update the TMS on the DR host to enable the new volume serial ranges to be accepted  during host cartridge entry processing. For more information, see 14.3.3, “Cartridge entry  considerations” on page 777. 8. Update the TMS on the DR host to reject any output that is directed towards volumes in  the production volume serial range. This process is done as a safeguard to protect against  production tapes being accidentally written to by the DR host. For more information, see  “TMS Write Protection” on page 776. 9. If a new Management Class was defined for each DR cluster in Step 4, modify the ACS  routines on the DR host to direct new tape allocations to this Management Class. Activate  the new SMS configuration on the DR host. 10.On the DR host, vary online the devices to the DR clusters. 11.By using the TS7700 MI, insert the new volume serial ranges by selecting  Virtual Virtual Volumes  Insert a new virtual volume range . Verify that the DR Host  processed the volumes during cartridge entry by reviewing the SYSLOG for the CBR3610I  messages surfacing those volumes.  12.If DFSMShsm is active on the DR host, mark all ML2 volumes full by issuing the following  command for each ML2 volume: If the  LI DISABLE,CBRUXENT  command was used in Step 3, use the  LI RESET,CBRUXENT  command on those production hosts to re-enable the ability to run host cartridge entry  processing. F xxxxx,DELVOL MIGRATION(MARKFULL) In addition, issue the following command to prevent DFSMShsm RECYCLE processing  from occurring: – F xxxxx,HOLD RECYCLE 13.For maximum protection, ensure that the following procedures do  not  run: – TMS housekeeping activity at the DR site – Short-on-scratch TMS procedures at the DR site 14.Run the DR test. Chapter 14. Disaster recovery testing  797