The recommended way to properly back up a Deliver database is to use the RMODBASE UNLOAD function:
//XXXXXXXX JOB ...
//RMODBASE EXEC PGM=RMODBASE,PARM='dlvr_hlq' <=== Modify DB name
//STEPLIB DD DISP=SHR,DSN=DLVR.CVDELOAD <=== Modify, if used
//SYSPRINT DD SYSOUT=*
//RMOUNLD DD DSN=xxxxxx.xxxxxx.RMOUNLD,
//SYSIN DD *
The resulting file will contain everything from the Deliver database, suitable for loading with RMODBASE LOAD.
Before performing the UNLOAD, it must be made sure that any Deliver RMOSTC tasks (that access the database) are down before performing the UNLOAD.