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. 

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. 

12.If DFSMShsm is active on the DR host, mark all ML2 volumes full by issuing the following command for each ML2 volume: 

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. 

