Note: When using SMS-managed DASD volumes with DFSMShsm and USERDATASETSERIALIZATION active, DFSMShsm tries to delete temporary data sets during automatic primary space management. If no global serialization exists, or if global serialization is not performed for temporary data sets, you can delete an in-use temporary data set. You can also convert some of the reserves that DFHSM issues, such as ARCBACV and ARCMIGV. See z/OS DFSMShsm Implementation and Customization Guide for information about DFSMShsm reserves and how to decide whether or not to convert them.