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环境：
OS:redhat 5.8
DB:Oracle 10.2.0.5 raw device

我们要养成经常备份ocr跟votedisk的习惯。但是ocr跟votedisk没有备份也是可以重建的。就像控制文件。但是过程较为麻烦。以下为详细步骤：

首先备份ocr跟votedisk：

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[root@rac1 ~]#
[root@rac1 ~]# ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          2
         Total space (kbytes)     :    1048296
         Used space (kbytes)      :       3292
         Available space (kbytes) :    1045004
         ID                       : 1891074113
         Device/File Name         : /dev/raw/raw1
                                    Device/File integrity check succeeded
         Device/File Name         : /dev/raw/raw2
                                    Device/File integrity check succeeded

         Cluster registry integrity check succeeded

[root@rac1 ~]# crsctl qeury css votedisk
Unknown parameter: qeury
[root@rac1 ~]# crsctl query css votedisk
0.     0    /dev/raw/raw3
1.     0    /dev/raw/raw4
2.     0    /dev/raw/raw5


[root@rac1 ~]# dd if=/dev/raw/raw3 of=/opt/votedisk.bak
2097152+0 records in
2097152+0 records out
1073741824 bytes (1.1 GB) copied, 462.285 seconds, 2.3 MB/s
[root@rac1 ~]# ocrconfig -export /opt/ocr.bak
[root@rac1 ~]# cd /opt/
[root@rac1 opt]# ls
ocr.bak  ORCLfmap  votedisk.bak

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[root@rac1 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@rac2 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


在安装节点执行：
[root@rac1 install]# ./rootdeinstall.sh
Removing contents from OCR mirror device
2560+0 records in
2560+0 records out
10485760 bytes (10 MB) copied, 0.521651 seconds, 20.1 MB/s
Removing contents from OCR device
2560+0 records in
2560+0 records out
10485760 bytes (10 MB) copied, 0.496207 seconds, 21.1 MB/s

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