今天是2014-04-01，忙碌了一天终于有时间写点东西了。前段时间写了RAc中ocr存在备份的情况下如何恢复，今天写一下在没有备份情况下如何去重建ocr和olr呢？
最大的悲剧莫过于数据库坏了备份没了。让我想起了前几年流行的一句话：“最大的悲剧是人活着，钱没了”。总之备份重于一切。
情景介绍：
在11G中ocr的asm磁盘组被用户不小心删了且所有备份都误删，olr呢也损坏了。至此悲剧重演。
恢复过程：（其实就是使用root.sh重建ocr的过程，重建之后可能需要重新注册相关资源如listener or database 实例等！）
1、清空所有节点cluster配置信息：（11G中存在rootcrs.sh脚本，该脚本默认存在于$GRID_HOME/crs/install）。
注，该脚本需要在root下执行，否则会有错误提示
[grid@rac-one install]$ ./rootcrs.pl
You must be logged in as root to run this script.
Log in as root and rerun this script.
2014-04-01 17:08:12: Not running as authorized user
Insufficient privileges to execute this script.
root or administrative privileges needed to run the script.
了解该脚本的功能可以查看-help。如升级、回退、重新配置等待》
[root@rac-two install]# ./rootcrs.pl -help
Usage:
rootcrs.pl [-verbose] [-upgrade [-force] | -patch]
[-paramfile
[-deconfig [-deinstall] [-keepdg] [-force] [-lastnode]]
[-downgrade -oldcrshome
[-unlock [-crshome
[-init]
If neither -upgrade nor -patch is supplied, a new install is performed
To see the full manpage for this program, execute:
perldoc rootcrs.pl
[root@rac-two install]#
在root下清除所有节点cluster 信息：
节点2：
[grid@rac-one install]$ su
Password:
[root@rac-one install]# ./rootcrs.pl -deconfig -force
Using configuration parameter file: ./crsconfig_params
Network exists: 1/192.168.4.0/255.255.255.0/eth0, type static
VIP exists: /rac-one-vip/192.168.4.113/192.168.4.0/255.255.255.0/eth0, hosting node rac-one
VIP exists: /rac-two-vip/192.168.4.114/192.168.4.0/255.255.255.0/eth0, hosting node rac-two
GSD exists
ONS exists: Local port 6100, remote port 6200, EM port 2016
CRS-2673: Attempting to stop 'ora.registry.acfs' on 'rac-one'
CRS-2677: Stop of 'ora.registry.acfs' on 'rac-one' succeeded
CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac-one'
CRS-2673: Attempting to stop 'ora.crsd' on 'rac-one'
CRS-2790: Starting shutdown of Cluster Ready Services-managed resources on 'rac-one'
CRS-2673: Attempting to stop 'ora.oc4j' on 'rac-one'
CRS-2673: Attempting to stop 'ora.GIDG.dg' on 'rac-one'
CRS-2673: Attempting to stop 'ora.DATADG.dg' on 'rac-one'
CRS-2677: Stop of 'ora.DATADG.dg' on 'rac-one' succeeded
CRS-2677: Stop of 'ora.GIDG.dg' on 'rac-one' succeeded
CRS-2673: Attempting to stop 'ora.asm' on 'rac-one'
CRS-2677: Stop of 'ora.oc4j' on 'rac-one' succeeded
CRS-2672: Attempting to start 'ora.oc4j' on 'rac-two'
CRS-2677: Stop of 'ora.asm' on 'rac-one' succeeded
CRS-2676: Start of 'ora.oc4j' on 'rac-two' succeeded
CRS-2792: Shutdown of Cluster Ready Services-managed resources on 'rac-one' has completed
CRS-2677: Stop of 'ora.crsd' on 'rac-one' succeeded
CRS-2673: Attempting to stop 'ora.crf' on 'rac-one'
CRS-2673: Attempting to stop 'ora.ctssd' on 'rac-one'
CRS-2673: Attempting to stop 'ora.evmd' on 'rac-one'
CRS-2673: Attempting to stop 'ora.asm' on 'rac-one'
CRS-2673: Attempting to stop 'ora.drivers.acfs' on 'rac-one'
CRS-2673: Attempting to stop 'ora.mdnsd' on 'rac-one'
CRS-2677: Stop of 'ora.crf' on 'rac-one' succeeded
CRS-2677: Stop of 'ora.evmd' on 'rac-one' succeeded
CRS-2677: Stop of 'ora.mdnsd' on 'rac-one' succeeded
CRS-2677: Stop of 'ora.ctssd' on 'rac-one' succeeded
CRS-2677: Stop of 'ora.asm' on 'rac-one' succeeded
CRS-2673: Attempting to stop 'ora.cluster_interconnect.haip' on 'rac-one'
CR