For each Solaris platform and/or architecture, Symantec recommends that you apply the latest Solaris operating system patches available from Sun. See the following site:
Make sure you install the following patches for VCS:
On Solaris x64: To use I/O Fencing, you must install the Solaris 10 patches 119716-10 and 118844-27.
On systems running Solaris 10, VCS requires NFS Patch 118833-24 to enable NFS agents to function properly.
If you are running the MultiNICB agent on Solaris 9, you must have the following patch from Sun: 116670-04.
If you are running the MultiNICB agent on Solaris 8, you must be at a minimum level of Solaris 8 update 2.
If you are using VCS with non-global zones and want the zone root on shared storage, use Solaris 10 Update 3 or later.