Pre-Req Checks
Perform permission checks on key locations where sccm will be setup. We had a problem experienced a few years ago where we had a "hash mismatch" error b/c the account I was using to perform the upgrade did not have permission to the install directory.
https://sccmf12twice.com/2017/02/sccm-2012-r2-sp1-failed-upgrade/
this problem is still possible in CB
Christopher Buck
shared this idea
2 comments
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bdam
commented
Further, along the same lines. The other thing that nearly always failed was for the installation process to verify that all components/roles had been stopped. Every. Single. Time. SQL would fail to go into single user mode because there were active connections to the DB and thus the upgrade would fail part way through.
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bdam
commented
AMEN Christopher. In our org our DBAs (who really are great, we love them) wanted a service account for the install versus using my own account. Makes migrations much easier when the DBO isn't an account that is no longer in AD. As a result, almost all of our initial upgrade attempts failed for one reason or another. So please enhance the pre-req check to look for all the necessary permisssions needed. Just today my TP upgrade stalled for hours before failing b/c it wasn't a local admin on the stie server. Had to dig into the logs to figure out it couldn't create a folder due to lack of permissions. This just seems like a very straight-forward thing to add.
For reference, all of this and more: https://docs.microsoft.com/en-us/sccm/core/plan-design/hierarchy/accounts#site-installation-account