8464ch14_DisasterRecoveryTesting.fm Draft Document for Review February 7, 2020 3:15 pm TMS statements that prevent the TMS on the DR host from being able to return-to-scratch  production volumes. For RMM, the statements are defined: These statements are also used by RMM to control which volume ranges are approved or  rejected during host cartridge entry processing. For more information about this process, see  14.3.3, “Cartridge entry considerations” on page 777. If your host does not use RMM, consult the vendor of your TMS to determine how that TMS  can prevent DR hosts from being able to return-to-scratch production volumes. If you suspect the second scenario might occur, it is recommended to set an expiration time  for the production scratch categories (up to 2000 years with R5.0) that is at least as long as  the duration of the DR test and enable Expire Hold to ensure those production volumes  returned-to-scratch are not deleted by the production TS7700 before the end of the DR test.  Be sure to restore the expiration settings for the production categories after the DR test is  complete. 14.3.3 Cartridge entry considerations After a DR host is IPL’d, one of the first steps  that are taken during a DR test (regardless of  the DR method chosen) is to determine the DR volume range that you want to use during the  DR test and insert those volumes by using the TS7700 MI.  However, if the hosts (DR  and  production) that are connected to your TS7700 grid do not  have their host cartridge entry environments configured correctly, it is possible that the DR  volumes that are inserted are never processed by the DR host they are intended to be  processed by, or they can be processed by the DR host but ignored or rejected because of an  improperly set-up host cartridge entry environment.  For more information about the activity that occurs during host cartridge entry processing,  see 10.5, “Host cartridge entry processing” on page 612. Whether a volume is accepted by a host during host cartridge entry processing is controlled  by the CBRUXENT user exit. This exit often is supplied by the vendor (or IBM) that supplies  the TMS that exists on a host, but it also can be user-written. If the exit is supplied by a TMS  vendor, that exit usually calls the TMS to approve or deny the entry request of a volume.  If the DR host uses RMM as the TMS, the PRTITION statements that are specified in the  EDGRMMxx parmlib member control the approval of cartridge entry and limits  return-to-scratch processing for those specified volume ranges. On the DR host, specify the  following statements to approve cartridge entry and allow return-to-scratch processing of  DR**** volumes, as well deny cartridge entry and prevent return-to-scratch processing of  non-DR**** volumes: PRTITION VOLUME(DR*) TYPE(ALL) SMT(ACCEPT) NOSMT(IGNORE) PRTITION VOLUME(*) TYPE(ALL) SMT(IGNORE) NOSMT(IGNORE) If production hosts that are attached to the grid use RMM, the following statement should be  specified on those hosts to deny cartridge entry and prevent return-to-scratch processing of  DR**** volumes: PRTITION VOLUME(DR*) TYPE(ALL) SMT(IGNORE) NOSMT(IGNORE) PRTITION VOLUME(DR*) TYPE(NORMM) SMT(ACCEPT) NOSMT(IGNORE) PRTITION VOLUME(DR*) TYPE(RMM) SMT(ACCEPT) NOSMT(IGNORE) PRTITION VOLUME(*) TYPE(NORMM) SMT(IGNORE) NOSMT(IGNORE) PRTITION VOLUME(*) TYPE(RMM) SMT(IGNORE) NOSMT(IGNORE) Chapter 14. Disaster recovery testing  777