You are running a Windows cluster setup. If your system is installed with a High Availability switch-over environment, make sure that the failover capabilities of the cluster switch-over software are disabled according to the guide in section "Preparing the ASCS Instance for the Downtime (HA Only)".
Note: This should be done at the end of SUM Preprocessing phase
Perform this step on the Active Node on the cluster
In the Cluster manager for all resources
enable "If resource fails Do not restart" option
Tags: SAP SUM, sp upgrade, Windows, Microsoft cluster, MSCS, pre reqs, downtime phase,