Lectori Salutem,I have to install SP1 for SQL server 2014 on a clustered environment with 2 nodes. Actual it is not that difficult to install the SP (download the SP, move the active node to the other node, install the SP on the node, move back from node 2 to 1, install SP on node 2 – done)….. but what if somethings goes wrong ??Assume that during installing the SP on node 1 something is going wrong - which preparations do I have to make before starting installing the SP?We are running on VM so I can make a VM-Snapshot from node 1 (and/or node 2) just before I start but what happens if I have to restore the VM-Snapshot? Is the data from the snapshot still in sync with the data from node 2 ???What do I have to do with the QUORUM disk which resides on one of the nodes (while restoring a VM-Snapshot) ??What will happen if I have to reinstall SQL server on one of the nodes when the installed version gets corrupted – and what are the recommendation reinstalling or rebuilding it?In other words – what is a recommendable FALLBACK scenario installing a SP on a 2-node SQL cluster?Please help me out with a (detailed) plan on how to accomplish this.Any help is appreciated.Guus KramerThe Netherlands
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