Read the SRU's README file before performing the update.
Check the update requirements of your storage devices.
Apply all updates before running the cluster in a production environment.
Check the hardware firmware levels and install any required firmware updates that might be needed. Consult your hardware documentation for information on firmware updates.
All nodes acting as cluster members must have the same updates.
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.