安装RAC clusterware时，有两项没有通过检查，提示信息如下：

Checking local Cluster Synchronization Services (CSS) status ... 
Actual Result: Unknown Host Exception has Occurred :10.3.83.25. 
Check complete. The overall result of this check is: Not executed <<<< 
Recommendation: Cluster Synchronization Services (CSS) provide services for single-instance Automatic Storage Management (ASM) in addition to being part of the Oracle Clusterware stack.  When configured stand-alone outside of the Oracle Clusterware, it is sometimes referred to as "local" CSS.

Because you are installing Oracle Clusterware on a set of nodes that already have local CSS configured, you must shut down any ASM instances and any databases using ASM and deconfigure local CSS on those nodes before proceeding with the Oracle Clusterware installation.  You can deconfigure local CSS by running 'localconfig delete' as the root user from OH/bin.  After the Oracle Clusterware installation and configuration is complete, CSS will be started and configured to run from the Oracle Clusterware Home.  You may then restart any ASM instances and any databases that use ASM. 
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Checking whether Oracle 9.2 RAC is available on all selected nodes 
Actual Result: Unknown Host Exception has Occurred :10.3.83.25. 
Check complete. The overall result of this check is: Not executed <<<< 
Recommendation: Make sure that all the nodes are a part of Oracle 9.2 RAC environment before you install Oracle Clusterware 10g Release 2.