环境：OEL 5.7 + Oracle 10.2.0.5 RAC
需求：更换存储，OCR、Voting disk同时需要更换到新存储。
1.替换OCR
替换OCR（Oracle Cluster Registry）首先需要关闭RAC所有节点的crs，然后导出当前的ocr配置文件，手工修改ocr.loc文件后，导入ocr配置文件，可选择性创建ocrmirror。
本次实验演示就是将原来的/dev/raw/raw1替换为/dev/raw/raw14，并创建ocrmirror为/dev/raw/raw15.
--replace ocr
--两个节点关闭crs
/s01/oracle/product/10.2.0/crs_1/bin/crsctl stop crs
--ocrcheck
/s01/oracle/product/10.2.0/crs_1/bin/ocrcheck
--导出ocr的配置
/s01/oracle/product/10.2.0/crs_1/bin/ocrconfig -export /tmp/ocrfile.dmp
--查看文件大小
ls -lrt /tmp/ocrfile.dmp
--两个节点修改ocr为新的/dev/raw/raw14
cat /etc/oracle/ocr.loc
--导入ocr配置文件
/s01/oracle/product/10.2.0/crs_1/bin/ocrconfig -import /tmp/ocrfile.dmp
/s01/oracle/product/10.2.0/crs_1/bin/ocrcheck
--增加ocrmirror
/s01/oracle/product/10.2.0/crs_1/bin/ocrconfig -replace ocrmirror /dev/raw/raw15
/s01/oracle/product/10.2.0/crs_1/bin/ocrcheck
--最后查看ocr.loc文件
cat /etc/oracle/ocr.loc 实际测试替换OCR的关键操作：
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl stop crs
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/ocrconfig -export /tmp/ocrfile.dmp
[root@rac1-server rules.d]# vi /etc/oracle/ocr.loc
ocrconfig_loc=/dev/raw/raw14
local_only=FALSE
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/ocrconfig -replace ocrmirror /dev/raw/raw15
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 96144
Used space (kbytes) : 4652
Available space (kbytes) : 91492
ID : 1953645605
Device/File Name : /dev/raw/raw14
Device/File integrity check succeeded
Device/File Name : /dev/raw/raw15
Device/File integrity check succeeded
Cluster registry integrity check succeeded
[root@rac1-server ~]# cat /etc/oracle/ocr.loc
#Device/file getting replaced by device /dev/raw/raw15
ocrconfig_loc=/dev/raw/raw14
ocrmirrorconfig_loc=/dev/raw/raw15
local_only=false
[root@rac1-server ~]# 2.替换voting disk
替换voting disk比较简单，只需要把新的voting disk加进来，然后把旧的删除即可。
本次实验演示就是新加/dev/raw/raw11,/dev/raw/raw12,/dev/raw/raw13,然后将原来的/dev/raw/raw2删除。
--replace voting disk
--which crsctl确认crsctl的全路径
/s01/oracle/product/10.2.0/crs_1/bin/crsctl
--查询当前的votedisk
crsctl query css votedisk
--添加新的votedisk
crsctl add css votedisk /dev/raw/raw11 -force
crsctl add css votedisk /dev/raw/raw12 -force
crsctl add css votedisk /dev/raw/raw13 -force
--删除旧的votedisk
crsctl delete css votedisk /dev/raw/raw2 -force实际替换voting disk的关键操作：
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl add css votedisk /dev/raw/raw11
Cluster is not in a ready state for online disk addition
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl add css votedisk /dev/raw/raw11 -force
Now formatting voting disk: /dev/raw/raw11
successful addition of votedisk /dev/raw/raw11.
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl query css votedisk
0. 0 /dev/raw/raw2
1. 0 /dev/raw/raw11
located 2 votedisk(s).
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl add css votedisk /dev/raw/raw12 -force
Now formatting voting disk: /dev/raw/raw12
successful addition of votedisk /dev/raw/raw12.
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl add css votedisk /dev/raw/raw13 -force
Now formatting voting disk: /dev/raw/raw13
successful addition of votedisk /dev/raw/raw13.
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl query css votedisk
0. 0 /dev/raw/raw2
1. 0 /dev/raw/raw11
2. 0 /dev/raw/raw12
3. 0 /dev/raw/raw13
located 4 votedisk(s).
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl delete css votedisk /dev/raw/raw2
Cluster is not in a ready state for online disk removal
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl delete css votedisk /dev/raw/raw2 -force
successful deletion of votedisk /dev/raw/raw2.
[root@rac1-server rules.d]# /s01/oracle/product/10.2.0/crs_1/bin/crsctl query css votedisk
0. 0 /dev/raw/raw11
1. 0 /dev/raw/raw12
2. 0 /dev/raw/raw13
located 3 votedisk(s).
[root@rac1-server rules.d]# 附录：本次实验环境：
1.旧存储模拟：4块盘：其中第1块盘分成了2个区，绑定为raw设备raw1和raw2，分别给ocr和voting disk使用，剩余3块是给ASM使用的：
2.新存储模拟：10块盘：其中前三块（raw11，raw12，raw13）给voting disk使用，第4块和第5块（raw14和raw15）给ocr使用：
3.使用新存储3块10G的盘和2块5G的盘分别新增DATADG和FRA2个ASM磁盘组，其中DATADG是Normal冗余，FRA是External冗余：