To remove a Sun Cluster patch that you've applied to your cluster, you must first remove the new Sun Cluster patch, and then reapply the previous patch or update release. To remove the new Sun Cluster patch, see the following procedures. To reapply a previous Sun Cluster patch, see one of the following procedures:
Before applying a Sun Cluster patch, check the patch's README file.
Become superuser on any node in the cluster.
Boot the cluster node into noncluster mode. For information about booting a node into noncluster mode, see How to Boot a Node in Noncluster Mode.
Remove the rebooting patch.
# patchrm patchid
Reboot the cluster node back into cluster mode.
Repeat steps 2 through 4 for each cluster node.