现象描述: 
在oracle 10g/11g版本引进的oracle集群软件oracle clusterware,如果需要在服务器上重新安装Oracle clusterware(crs),首先必须把Oracle clusterware(crs)删除干净。
    
告警信息: 
因Oracle clusterware(crs)未删除干净,将导致在安装crs时运行root.sh命令失败。

原因分析: 
ocr、voting文件需要重新低格(清零)才能被复用。

处理过程: 
约定:*操作步骤只需在其中任意一个节点执行即可,否则在所有节点都要执行
 
一、脚本自动删除
切换到root用户
$Su – root
#cd $ORA_CRS_HOME/install

1、执行rootdelete.sh脚本
# ./rootdelete.sh
Getting local node name
NODE = rp5470b
PRKO-2006 : Invalid node name: rp5470b
Stopping resources.
This could take several minutes.
Error while stopping resources. Possible cause: CRSD is down.
Stopping Cluster Synchronization Services.
Unable to communicate with the Cluster Synchronization Services daemon.
Oracle CRS stack is not running.
Oracle CRS stack is down now.
Removing script for Oracle Cluster Ready services
Updating ocr file for downgrade
Cleaning up SCR settings in '/var/opt/oracle/scls_scr'
Cleaning up Network socket directories
 
2、执行rootdeinstall.sh脚本*
# ./rootdeinstall.sh
Verifying existence of ocr.loc file
Removing contents from OCR mirror device
2560+0 records in
2560+0 records out
Removing contents from OCR device
2560+0 records in
2560+0 records out

3、 使用Oracle Universal Installer卸载CRS软件  
$export DISPLAY=10.69.24.124:0.0
$./runInstaller


二、手工删除

1、停止所有的服务
(数据库、ASM、监听、nodeapps)

2、停止CRS
#Crsctl stop crs
#init.crs stop crs

3、 删除与系统启动相关的文件
Sun:
       rm /etc/init.d/init.cssd
       rm /etc/init.d/init.crs
       rm /etc/init.d/init.crsd
       rm /etc/init.d/init.evmd
       rm /etc/rc3.d/K96init.crs
       rm /etc/rc3.d/S96init.crs
       rm -Rf /var/opt/oracle/scls_scr
       rm -Rf /var/opt/oracle/oprocd
       rm /etc/inittab.crs
       cp /etc/inittab.orig /etc/inittab
Linux:
       rm /etc/oracle/*
       rm -f /etc/init.d/init.cssd
       rm -f /etc/init.d/init.crs
       rm -f /etc/init.d/init.crsd
       rm -f /etc/init.d/init.evmd
       rm -f /etc/rc2.d/K96init.crs
       rm -f /etc/rc2.d/S96init.crs
       rm -f /etc/rc3.d/K96init.crs
       rm -f /etc/rc3.d/S96init.crs
       rm -f /etc/rc5.d/K96init.crs
       rm -f /etc/rc5.d/S96init.crs
       rm -Rf /etc/oracle/scls_scr
       rm -f /etc/inittab.crs
       cp /etc/inittab.orig /etc/inittab
HP-UX:
       rm /sbin/init.d/init.cssd
       rm /sbin/init.d/init.crs
       rm /sbin/init.d/init.crsd
       rm /sbin/init.d/init.evmd
       rm /sbin/rc2.d/K960init.crs
       rm /sbin/rc2.d/K001init.crs
       rm /sbin/rc3.d/K960init.crs
       rm /sbin/rc3.d/S960init.crs
       rm -Rf /var/opt/oracle/scls_scr
       rm -Rf /var/opt/oracle/oprocd
       rm /etc/inittab.crs
       cp /etc/inittab.orig /etc/inittab
HP Tru64:
       rm /sbin/init.d/init.cssd
       rm /sbin/init.d/init.crs
       rm /sbin/init.d/init.crsd
       rm /sbin/init.d/init.evmd
       rm /sbin/rc3.d/K96init.crs
       rm /sbin/rc3.d/S96init.crs
       rm -Rf /var/opt/oracle/scls_scr
       rm -Rf /var/opt/oracle/oprocd
       rm /etc/inittab.crs
       cp /etc/inittab.orig /etc/inittab
IBM AIX:
       rm /etc/init.cssd
       rm /etc/init.crs
       rm /etc/init.crsd
       rm /etc/init.evmd
       rm /etc/rc.d/rc2.d/K96init.crs
       rm /etc/rc.d/rc2.d/S96init.crs
       rm -Rf /etc/oracle/scls_scr
       rm -Rf /etc/oracle/oprocd
       rm /etc/inittab.crs
       cp /etc/inittab.orig /etc/inittab
      
4、 Kill掉遗留的CRS进程(或重启机器)
       ps -ef | grep crs  
       kill <crs pid>
       ps -ef | grep evm
       kill <evm pid>
       ps -ef | grep css  
       kill <css pid>
      
5、 删除临时文件
    rm -f /var/tmp/.oracle
    或
    rm -f /tmp/.oracle
   
6、 删除/etc/oracle/ocr.loc文件

7、使用Oracle Universal Installer卸载CRS软件(参照一、3、)

8、擦除ocr和voting磁盘的内容*
    dd if=/dev/zero of=/dev/vg02/rocr1 bs=8192 count=2560
    dd if=/dev/zero of=/dev/vg02/rocr2 bs=8192 count=2560
    dd if=/dev/zero of=/dev/vg02/rvoting1 bs=8192 count=12800
    dd if=/dev/zero of=/dev/vg02/rvoting2 bs=8192 count=12800
    dd if=/dev/zero of=/dev/vg02/rvoting3 bs=8192 count=12800
删除完成,可以重新安装Oracle Clusterware。 


建议与总结: 
在重新安装crs前,必须把原先的crs清除干净。