This topic describes how to customize certain DFSMSdss functions by setting flags in ADRPATCH, a module in the DFSMSdss load module (ADRDSSU). You can set the flags in ADRPATCH dynamically through the DFSMSdss SET PATCH auxiliary command, or you can set them in ADRPATCH permanently through the AMASPZAP program.

The SET PATCH offset=value command specifies that DFSMSdss set the patch byte, at the specified offset to the specified value. You must have READ access authorization to that profile to use the SET PATCH command. Your installation can limit use of the SET PATCH command with the RACF® FACILITY class profile STGADMIN.ADR.PATCH.

The following sample JCL sets the flags in ADRPATCH. The specific offsets and values of the flags are explained in the sections that follow. For the mapping of the flags in ADRPATCH, see the ADRPTCHB data area description in Table 1.