From a SPARC based system, you can upgrade from the Solaris 2.6, Solaris 7, or Solaris 8 operating environment to a Solaris 8 Update operating environment.
From an IA based system, you can upgrade from the Solaris 7 or 8 operating environment to a Solaris 8 Update operating environment.
You cannot upgrade to the Solaris 7 operating environment.
You must upgrade to the same release that contained the Solaris Live Upgrade software. For example, if on your current operating environment you installed Solaris Live Upgrade from the Solaris 8 10/01 release, you must upgrade to the Solaris 8 10/01 release.
Solaris Live Upgrade is included in the Solaris 8 software, but if you want to upgrade from previous releases, you need to install the Solaris Live Upgrade packages on your current operating environment. You can install the Solaris Live Upgrade packages from the installer on the Solaris 8 Software 2 of 2 CD.
For instructions on installing the packages, see To Install Solaris Live Upgrade.