also checked if DRM is started...

lssrc -g rsct_rm

Subsystem Group PID Status
IBM.MgmtDomainRM rsct_rm 3948 active
IBM.HostRM rsct_rm 3999 active
IBM.DRM rsct_rm 4038 active
IBM.ServiceRM rsct_rm 4043 active
IBM.ERRM rsct_rm inoperative
IBM.AuditRM rsct_rm inoperative
IBM.SensorRM rsct_rm inoperative

Only the last 3 are inoperative, whatever that may be...