Guidelines for a smooth install of a Service Pack or Hotfix on a clustered SQL environment >
1 Install SP on first node
2 Failover active cluster groups to second node (Cluster Administrator)
3 Restart first node
(await restart of first node)
4 Install SP on second node
5 Failover active cluster groups to first node
6 Restart second node
(await restart of second node)
7 Test failing over of each group, leaving them back on original nodes.
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