At DFSMSrmm subsystem start-up, once the subsystem is fully established, DFSMSrmm dynamically adds its exit routine to the HZSADDCHECK exit and dynamically adds/updates the supported migration and health checks. Also, any time that DFSMSrmm subsystem is stopped or refreshed, the checks are deleted so that no further health check processing can be run until DFSMSrmm is restarted successfully.

The DFSMSrmm migration and health checks require that both Health Checker and System Rexx are configured and active. The checks are shipped as compiled Rexx and can run under either the Library for Rexx on zSeries or the Alternate Library for Rexx on zSeries.

These health checks are shipped INACTIVE and must be activated to run.

For more information, refer to IBM Health Checker for z/OS: User's Guideand the "Using IBM Health Checker for z/OS for migration checking" section in z/OS Migration.