You can use the product installer to upgrade VCS.
To upgrade VCS using the product installer
# ./installer
The installer starts the product installation program with a copyright message. It then specifies where it creates the logs. Note the log's directory and name.
The installer runs some verification checks on the nodes.
The installer lists the filesets to upgrade.
The installer stops VCS processes, uninstalls filesets, installs or upgrades filesets, and configures VCS.
The installer lists the nodes that Symantec recommends you restart.
The installer displays the location of log files, summary file, and response file.
For instructions to upgrade VCS or SFHA, see the Veritas Cluster Server Installation Guide or the Storage Foundation and High Availability Installation Guide.
If you are upgrading from 4.x, you may need to create new VCS accounts if you used native OS accounts.
See Creating new VCS accounts if you used native operating system accounts.