If you specify an HSMPARM DD, it will take precedence over MVS™ concatenated PARMLIB support. However, if you are using MVS concatenated PARMLIB support, DFSMShsm uses the PARMLIB data set containing the ARCCMDxx member and the (possibly different) PARMLIB data set containing the ARCSTRxx member (if any) that is indicated in the startup procedure.

When ABARS is used, its address space (one or more) is termed ‘secondary’ to a ‘primary address space’. That primary address space must have HOSTMODE=MAIN; you must start it with a startup procedure in SYS1.PROCLIB (similar to the startup procedure in Figure 1.) If your disaster recovery policy includes aggregate backup and recovery support (ABARS), also include a second startup procedure in SYS1.PROCLIB for the DFSMShsm secondary address space.