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This could affect remote systems trying to get media from this system. To prevent this there are 2 options available.
Option 1
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Use the Balancing Media in a BRMS Network option to balance media between systems in the BRMS network
Option 2
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Create a CL program that will look similar to this and then call the CLP to run maintenance. This will prevent other systems in the BRMS network from trying to BRMS DDM to the system running maintenance (note normal DDm will continue to work)
PGM
INZBRM INZBRM OPTION(*FLASHCOPY) STATE(*STRPRC)
STRMNTBRM
MONMSG BRM0000
INZBRM STRMNTBRM
MONMSG BRM0000
INZBRM OPTION(*FLASHCOPY) STATE(*ENDPRC)
ENDPGM ENDPGM