z/OS DFSMS Implementing System-Managed Storage
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DFSMSdss Installation Exit

z/OS DFSMS Implementing System-Managed Storage
SC23-6849-00

Programming Interface Information

Table 1 describes the DFSMSdss installation exit.

Table 1. DFSMSdss Installation Exit
Name Usage
ADRREBLK Data Set Reblock Exit:
  • System-managed and non-system-managed data sets.
  • Called if REBLOCK is specified for COPY or RESTORE. If the VTOC entry for the data set indicates that the data set is reblockable, the data set is always reblocked and the ADDREBLK exit is not taken.
  • Return from the exit with a return code of 12 to enable the data set to be marked as reblockable. Be aware, however, that some data sets (such as load libraries) are sensitive to reblocking.
End Programming Interface Information

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