Patching Mirrored Systems with the Solaris Live Upgrade Software 
by Jeff Smith
June, 2007
Applying operating system patches is often time consuming and disruptive. In fact, most patching techniques require systems and disks to be taken offline for the patching process. The Solaris Live Upgrade software enables administrators to stage patches without impacting running systems, and minimize the actual downtime associated with patching to the time needed to reboot the system. This Sun BluePrints article discusses how the Solaris Live Upgrade software can be used to patch mirrored systems and rollback to the pre-patched environment should the need arise. While this article focuses on Sun systems incorporating SPARC processors that run the Solaris 8, 9, and 10 Operating System (OS), the procedures can be used on x86 and x64 systems as well. However, device naming conventions may be different on these systems. It is important to note that the procedures outlined in this document assume knowledge of the Solaris Volume Manager software and experience with patching the Solaris Operating System on Sun servers.
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