如何重新创建ocr和votedisk（在ocr和votedisk损坏，并且没有备份时，这是非常有用的）？
首先，在所有的节点停止cluster
[root@node1 ~]# ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 1125736
Used space (kbytes) : 3852
Available space (kbytes) : 1121884
ID : 849560479
Device/File Name : /dev/raw/raw1
Device/File integrity check succeeded
Device/File not configured
Cluster registry integrity check succeeded
[root@node1 ~]# crsctl query css votedisk
0. 0 /dev/raw/raw2
1. 0 /dev/raw/raw4
located 2 votedisk(s).
[root@node1 ~]# crsctl check crs
Failure 1 contacting CSS daemon
Cannot communicate with CRS
Cannot communicate with EVM
[root@node1 ~]# ssh node2 /u01/app/crs_home/bin/crsctl check crs
Failure 1 contacting CSS daemon
Cannot communicate with CRS
Cannot communicate with EVM
在每个节点执行rootdelete.sh脚本
[root@node1 ~]# cd $CRS_HOME/install
[root@node1 install]# ./rootdelete.sh
Shutting down Oracle Cluster Ready Services (CRS):
Stopping resources. This could take several minutes.
Error while stopping resources. Possible cause: CRSD is down.
Shutdown has begun. The daemons should exit soon.
Checking to see if Oracle CRS stack is down...
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 '/etc/oracle/scls_scr'
Cleaning up Network socket directories
[root@node1 install]# ssh node2 /u01/app/crs_home/install/rootdelete.sh
Shutting down Oracle Cluster Ready Services (CRS):
Stopping resources. This could take several minutes.
Error while stopping resources. Possible cause: CRSD is down.
Shutdown has begun. The daemons should exit soon.
Checking to see if Oracle CRS stack is down...
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 '/etc/oracle/scls_scr'
Cleaning up Network socket directories
在任意节点上，执行rootdeinstall.sh脚本（只需在一个节点上运行即可）
[root@node1 install]# ./rootdeinstall.sh
Removing contents from OCR device
2560+0 records in
2560+0 records out
10485760 bytes (10 MB) copied, 0.486033 seconds, 21.6 MB/s
在所有节点上执行root.sh脚本
[root@node1 crs_home]# pwd
/u01/app/crs_home
[root@node1 crs_home]# ./root.sh
WARNING: directory '/u01/app' is not owned by root
WARNING: directory '/u01' is not owned by root
No value set for the CRS parameter CRS_OCR_LOCATIONS. Using Values in paramfile.crs
Checking to see if Oracle CRS stack is already configured
Setting the permissions on OCR backup directory
Setting up NS directories
Oracle Cluster Registry configuration upgraded successfully
WARNING: directory '/u01/app' is not owned by root
WARNING: directory '/u01' is not owned by root
Successfully accumulated necessary OCR keys.
Using ports: CSS=49895 CRS=49896 EVMC=49898 and EVMR=49897.
node <nodenumber>: <nodename> <private interconnect name> <hostname>
node 1: node1 node1-priv node1
node 2: node2 node2-priv node2
Creating OCR keys for user 'root', privgrp 'root'..
Operation successful.
Now formatting voting device: /dev/raw/raw2
Format of 1 voting devices complete.
Startup will be queued to init within 30 seconds.
Adding daemons to inittab
Expecting the CRS daemons to be up within 600 seconds.
CSS is active on these nodes.
node1
CSS is inactive on these nodes.
node2
Local node checking complete.
Run root.sh on remaining nodes to start CRS daemons.
[root@node1 crs_home]# ssh node2 /u01/app/crs_home/root.sh
WARNING: directory '/u01/app' is not owned by root
WARNING: directory '/u01' is not owned by root
No value set for the CRS parameter CRS_OCR_LOCATIONS. Using Values in paramfile.crs
Checking to see if Oracle CRS stack is already configured
Setting the permissions on OCR backup directory
Setting up NS directories
Oracle Cluster Registry configuration upgraded successfully
WARNING: directory '/u01/app' is not owned by root
WARNING: directory '/u01' is not owned by root
clscfg: EXISTING configuration version 3 detected.
clscfg: version 3 is 10G Release 2.
Successfully accumulated necessary OCR keys.
Using ports: CSS=49895 CRS=49896 EVMC=49898 and EVMR=49897.
node <nodenumber>: <nodename> <private interconnect name> <hostname>
node 1: node1 node1-priv node1
node 2: node2 node2-priv node2
clscfg: Arguments check out successfully.
NO KEYS WERE WRITTEN. Supply -force parameter to override.
-force is destructive and will destroy any previous cluster
configuration.
Oracle Cluster Registry for cluster has already been initialized
Startup will be queued to init within 30 seconds.
Adding daemons to inittab
Expecting the CRS daemons to be up within 600 seconds.
CSS is active on these nodes.
node1
node2
CSS is active on all nodes.
Waiting for the Oracle CRSD and EVMD to start
Oracle CRS stack installed and running under init(1M)
Running vipca(silent) for configuring nodeapps
Invalid interface "255.255.255.0/eth0" entered in an input argument.
[root@node1 crs_home]# oifcfg iflist
eth0 192.168.100.0
eth1 100.100.100.0
[root@node1 crs_home]# crs_stat -t -v
CRS-0202: No resources are registered.
[root@node1 crs_home]# crsctl check crs
CSS appears healthy
CRS appears healthy
EVM appears healthy
[root@node1 crs_home]# ssh node2 /u01/app/crs_home/bin/crsctl check crs
CSS appears healthy
CRS appears healthy
EVM appears healthy
从上面可以看出，crs已经正常运行，但是vip one gns等资源没有配置成功（可能是因为执行我修改过ip的原因），手工调用vipca图形界面后：
[root@node1 ~]# crs_stat -t -v
Name Type R/RA F/FT Target State Host
----------------------------------------------------------------------
ora.node1.gsd application 0/5 0/0 ONLINE ONLINE node1
ora.node1.ons application 0/3 0/0 ONLINE ONLINE node1
ora.node1.vip application 0/0 0/0 ONLINE ONLINE node1
ora.node2.gsd application 0/5 0/0 ONLINE ONLINE node2
ora.node2.ons application 0/3 0/0 ONLINE ONLINE node2
ora.node2.vip application 0/0 0/0 ONLINE ONLINE node2
添加剩余资源到rac中，如asm，instance，linstener
调用netca添加listener，使用srvctl添加其他服务，至此重建ocr和votedisk完成
有一点需要注意，ocr和votedisk重建后，ocr磁盘和votedisk磁盘会设置为cluster新建时的初始值，如何后续我们对此进行过修改，则需要我们手工来进行再次维护了
[root@node1 ~]# ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 1125736
Used space (kbytes) : 3760
Available space (kbytes) : 1121976
ID : 1334010282
Device/File Name : /dev/raw/raw1
Device/File integrity check succeeded
Device/File not configured
Cluster registry integrity check succeeded
[root@node1 ~]# crsctl query css votedisk
0. 0 /dev/raw/raw2
located 1 votedisk(s).
[root@node1 ~]#