8464ch14_DisasterRecoveryTesting.fm Draft Document for Review February 7, 2020 3:15 pm 2. By using the TS7700 MI, add the MEDIA1 and MEDIA2 categories that are chosen to the  TS7700 by selecting  Virtual Categories Add Scratch Category . 3. Choose the volume serial ranges that will be created and used for input/output processing  on the DR host. Update the TMS on the production hosts to ignore the ranges during host  cartridge entry processing (for more information, see 14.3.3, “Cartridge entry  considerations” on page 777) or use the  LI DISABLE,CBRUXENT  command to prevent host  cartridge entry processing entirely. 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 that is 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 host.  These categories will be used by volumes that are created for use by the DR host during  the DR test. After the categories are defined, restart the DR host to ensure that the  categories are used.  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  successfully 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. Alternatively, use the  DS QL,CATS  command 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.  Note:  You must insert the DR volume serial range  before  completing the next step  (breaking the grid links). After the grid links are broken, you cannot insert volumes to  the DR cluster unless read/write ownership takeover mode is enabled, which is  not recommended because it can allow production volumes to be written to by the DR host. 12.Contact your CE to break the grid link connections between the production clusters and  the disaster clusters. Do  not  disable a grid link by using the  Library Request  command.  Disabling the grid link by using this command does not stop synchronous mode copies  and the exchange of status information. Chapter 14. Disaster recovery testing  799