Explanation: ONDEMANDMIGRATION is an optional parameter specifying whether on-demand migration should be performed on SMS-managed volumes that have exceeded the high threshold and that belong to a storage group defined using AM=Y (Auto Migrate, yes). This parameter can be abbreviated as ODM.
For more information about on-demand migration, see Using on-demand migration.
SMS relationship: The ONDEMANDMIGRATION parameter applies to SMS-managed volumes only. It is ignored for non-SMS-managed volumes. For non-SMS managed volumes, interval migration is performed instead (if enabled).
SETSYS default: If you specify the ONDEMANDMIGRATION parameter without N (no) or Y (yes), then the SETSYS default for this parameter is N (on-demand migration is not performed).
DFSMShsm default: If you do not specify ONDEMANDMIGRATION on the SETSYS command during startup, the default is to perform interval migration.