在安装grid之前对环境监察遇到如下错误：http://www.cndba.cn/leo1990/article/2967http://www.cndba.cn/leo1990/article/2967http://www.cndba.cn/leo1990/article/2967http://www.cndba.cn/leo1990/article/2967

[grid@rac1 grid]$ ./runcluvfy.sh stage -pre crsinst -n rac1,rac2 -verbose
Performing pre-checks for cluster services setup 
Checking node reachability...
Check: Node reachability from node "rac1"
  Destination Node                      Reachable?              
  ------------------------------------  ------------------------
  rac1                                  yes                     
  rac2                                  yes                     
Result: Node reachability check passed from node "rac1"
Checking user equivalence...

Check: User equivalence for user "grid"
  Node Name                             Status                  
  ------------------------------------  ------------------------
  rac2                                  passed                  
  rac1                                  passed                  
Result: User equivalence check passed for user "grid"
ERROR: 
Reference data is not available for verifying prerequisites on this operating system distribution
Verification cannot proceed
Pre-check for cluster services setup was unsuccessful on all the nodes.

解决方法：http://www.cndba.cn/leo1990/article/2967http://www.cndba.cn/leo1990/article/2967

这是由于bug15973656，其中指出runcluvfy.sh无法正确检测Red Hat 6.2及更高版本的操作系统。该问题也影响CentOS 6.2及以上版本。
官方方解决方案：该错误在12.1.0.1 GI 升级 PSU1,12.1.0.2 或者直接使用12.0.1.2 grid软件安装，此bug在12.0.1.2中修复。 
正式解决方法中得到修复：安装redhat-release-6Server-1。noarch.rpm
MOS为这个问题提供了一个bug补丁--clupack.zip。此zip文件包含以下文件：
在redhat-RELEASE-6Server-1。noarch.rpm
filegroup6.jar
filegroup10.jar
cvu_prereq.xml
因此，如果想在12c RAC安装期间运行runcluvfy.sh，请从错误15973656 下载clupack.zip并加载RPM：
[root@rac1 sotfware]# rpm -ivh redhat-release-6Server-1.noarch.rpm 
Preparing...                ########################################### [100%]
   1:redhat-release         ########################################### [100%]
[root@rac1 sotfware]# ll
total 4531684
-rw-r--r--  1 root   root          65429 Aug 26 04:35 clupack.zip
-rw-r--r--  1 root   root          41724 Dec  4  2012 cvu_prereq.xml
-rw-r--r--  1 root   root          19034 Dec  4  2012 filegroup10.jar
-rw-r--r--  1 root   root          42624 Dec  4  2012 filegroup6.jar
-rw-r--r--  1 root   root           1637 Jun 13  2012 redhat-release-6Server-1.noarch.rpm
[root@rac1 sotfware]# rpm -qa redhat-release
redhat-release-6Server-1.noarch
[grid@rac1 grid]$ ./runcluvfy.sh stage -pre crsinst -n rac1,rac2 -verbose
然后校验成功。

参考mos 文档1567127.1，1514012.1http://www.cndba.cn/leo1990/article/2967

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