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| Oracle Solaris Cluster Upgrade Guide Oracle Solaris Cluster 4.1

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Chapter 1

## Preparing to Upgrade Oracle Solaris Cluster Software

This chapter provides the following information and procedures to prepare to upgrade or update the Oracle Solaris Cluster 4.1 software:

- Upgrade Requirements and Software Support Guidelines

- Choosing an Oracle Solaris Cluster Upgrade Method

An upgrade moves the cluster to the latest major or minor Oracle Solaris Cluster release by updating all packages. By default, the upgrade also upgrades the Oracle Solaris OS and any other packages to the latest compatible version.

A software update changes a specific Oracle Solaris Cluster package to a newer Support Repository Update (SRU) level. For more information about using the `pkg` commands to update packages, see Overview of Updating Oracle Solaris Cluster Software in Oracle Solaris Cluster System Administration Guide.

Note - Applying an Oracle Solaris Cluster 4.1 Core SRU does not provide the same result as upgrading the software to the Oracle Solaris Cluster 4.1 release.

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