Forcing SCOM 2007 installation/upgrade when prerequisites checker failed

Posted on 1 April, 2009. Filed under: SCOM 2007 |

Installing and upgrading SCOM 2007 can give some trouble when prerequisites fail and the install or upgrade will stop because of that. In most environments this problem will not arise because SCOM is initially sized correctly and your not moving your database round or you haven’t tested RC builds in production;-). But for those environment where prerequisite fail your must find a way to get around it.

So to kickoff a (Root) Management Server installation or upgrade where the installation wizard states your prerequisites aren’t in place use the following command line parameters to force/fake the prerequisites parameter.

MSIEXEC /i <path>\MOM.msi /qn /l*v D:\logs\MOMUpgrade.log PREREQ_COMPLETED=1

This is a not supported workaround!!!! When you run into this problem you have to be 100% sure you have all prerequisites in place for the OpsMgr roles on the machine your upgrading or installing. Try to never use the PREREQ_COMPLETED=1 because 99 out of 100 times the prerequisite checker is right!

Regards,
Walter Eikenboom
http://weblogwally.spaces.live.com