Installation exits called during level 1 to level 2 migration

Two installation exits can be called during level 1 to level 2 migration: the tape data set exit and the second-level migration data set exit.

The tape data set exit (ARCTDEXT) receives control (if it is enabled) when an output tape data set is opened if the tape security option is expiration date (EXPIRATION) or expiration date including password-protected data sets (EXPIRATIONINCLUDE). You can use the tape data set exit to change the expiration date to be recorded in the tape label to a date other than 99365.

The second-level migration data set exit (ARCMMEXT) receives control when a migrated data set is selected for migration. You can use this exit to further control whether data sets migrate from ML1 volumes to other migration volumes. For example, you can use this exit to hold small data sets in SDSP data sets on ML1 volumes instead of allowing them to migrate to ML2.

Related reading

For more information about DFSMShsm exits, see z/OS DFSMS Installation Exits.