This section explains how to perform a phased upgrade of Storage Foundation on four nodes with four service groups. Note that in this scenario, the service groups cannot stay online during the upgrade of the second subcluster. Do not add, remove, or change resources or service groups on any nodes during the upgrade. These changes are likely to get lost after the upgrade. The following example illustrates the steps to perform a phased upgrade. The phased upgrade is from Storage Foundation 5.0 MP3 in a secure cluster to Storage Foundation 5.1 in a secure cluster.

See About phased upgrade.