Problem Summary: After upgrading from the Solaris 9 OS to the Solaris 10 OS on a cluster that runs Sun Cluster 3.1 4/04 software or earlier, booting the node into noncluster mode results in the node panicking.
Workaround: Install one of the following patches before you upgrade from Solaris 9 to Solaris 10 software.
SPARC based systems: 117949-09 or higher
x86 based systems: 117909-09 or higher