Use the following tips to administer Oracle Solaris Cluster SRU updates more efficiently:
Read the SRU's README file before performing the update.
Check the update requirements of your storage devices.
Check the hardware firmware levels and install any required firmware updates that might be needed. Consult your hardware documentation for information on firmware updates.
When updating a node, you might occasionally need to temporarily remove a node from cluster membership, or to stop the entire cluster before performing the update.
Apply all updates before running the cluster in a production environment.
All nodes acting as cluster members must have the same updates.
Run the scversions command on all nodes. This enables the cluster to utilize all features in the newer software. See the scversions(8) man page for more information.
Keep cluster subsystem updates up to date. These updates include, for example, volume management, storage device firmware, and cluster transport.
Test failover after major updates. Be prepared to back out the update if cluster operation is degraded or impaired.