How to use MVSHFSDsnPrefix to change the /mpm file systems HLQ without re-installing CA CSM

Document ID : KB000106939
Last Modified Date : 17/07/2018
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Question:
Can I change the MVSHFSDsnPrefix HLQ specified in the MSMSetupOptionsFile.properties without having to reinstall the CA-CSM? 
Answer:
Yes, the MVSHFSDsnPrefix parameter in the MSMSetupOptionsFile.properties file is the equivalent to mpmHlq in SAMPLIB(DBINIT) . 

Go into SAMPLIB(DBINIT) and update mpmHlq.to have the new HLQ. Shutdowm MSMTC and temporarily change the //DBINIT DD to //DBUPDATE in the MSMTC startup JCL/PROC and start MSMTC. 

Note that this change is not retroactive. Only new file systems will have the new HLQ. To change them all will involve updating the MOUNTPOINT table.