Use the SETSMS command to immediately enable or disable CA reclaim for the system. SETSMS overrides the value in IGDSMSxx. To retain the setting you specified with the command, remember to update IGDSMSxx prior to the next IPL. The command is:

SETSMS CA_RECLAIM (NONE | {DATACLAS | DATACLASS})

where

NONE

Disables CA reclaim for the system, regardless of the value for the CA reclaim attribute in data class or catalog entries.

DATACLAS or DATACLASS

Enables CA reclaim for the system. CA reclaim is in effect for all eligible data sets for which CA reclaim is not disabled with the data class attribute or the ALTER command. You can use the CA Reclaim attribute in each data class to enable or disable CA reclaim for new data sets as they are defined.

SETSMS has no default for CA_RECLAIM. For more information, see the description of the SETSMS command in z/OS MVS System Commands.