This topic explains how you can customize DFSMSdss by writing exit routines. DFSMSdss exits routines are:

Table 1 describes the DSS Installation Exits.

Table 1. DSS Installation Exits

Module Name	Description	When Available
ADRDYEXT _EXIT1	DFSMSdss Dynamic Exit
ADRUPSWD	Authorization Exit Routine	Volume level and data set level
ADRUENQ	Enqueue Exit Routine
ADRUIXIT	Options Exit Routine	When DFSMSdss is invoked and also before the processing of each task.
ADRREBLK	Reblock Exit Routine	See Reblock Installation Exit Routine (ADRREBLK).