By default, SMS reclaims generation data sets. A system programmer can turn on GDS reclaim processing in either of two ways:

• Set the value of GDS_RECLAIM in the PARMLIB member IGDSMSxx to YES, and issue the SET SMS=xx command.
• Issue the SETSMS GDS_RECLAIM(YES) command. This change is in effect until a system operator or system programmer reissues the command or IPLs the system.