Step 16: Restarting z/OS with DFSMSrmm implemented

You are ready to start the system with DFSMSrmm implemented. You cannot restart z/OS without an IPL, however an IPL can usually be avoided. For example, you can avoid an IPL when performing one of these tasks:

Changing subsystem name information in IEFSSNxx
Setting SMF information in SMFPRMxx
Changing GRS RNL definitions in GRSRNLxx
Using the PARMLIB UPDATE command to implement changes to IKJTSOxx

If you performed an IPL during Step 1, described in Step 1: Preparing to implement DFSMSrmm, you have to re-IPL only if you cannot dynamically implement changes to the z/OS system parmlib members or modified installation exits. You must re-IPL with CLPA to include new levels of DFSMSrmm code that have LPALIB as the target library.