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1、新建一个磁盘组+NEW
Create diskgroup CRS NORMAL REDUNDANCY
FAILGROUP CRS_0000 disk '/dev/asm-orctest1'
FAILGROUP CRS_0001 disk '/dev/asm-orctest2'
FAILGROUP CRS_0002 disk '/dev/asm-orctest3'
ATTRIBUTE 'compatible.asm' = '11.2';
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2、查看ocr备份
[root@rac02 bin]# ./ocrconfig -manualbackup
ocrconfig -showbackup
[root@rac02 bin]# ./ocrconfig -showbackup manual
rac01 2017/08/03 06:47:10 /u01/11.2.0/grid/cdata/rac-cluster/backup_20170803_064710.ocr
rac02 2017/08/01 02:32:01 /u01/11.2.0/grid/cdata/rac-cluster/backup_20170801_023201.ocr
2、2个节点停止集群并修改配置文件（更改里面的磁盘组名字为新建的磁盘组）
./crsctl stop crs
vi /etc/oracle/ocr.loc
3、启动一个节点到独占模式并确认磁盘组+NEW是否mount，如没有，手动mount。
crsctl start crs -excl -nocrs
SQL> select GROUP_NUMBER, NAME,STATE from v$asm_diskgroup;
GROUP_NUMBER NAME STATE
------------ ------------------------------ -----------
1 ASM_DATA1 MOUNTED
2 ASM_FL MOUNTED
3 CRS MOUNTED
4 DATA MOUNTED
4、使用OCR备份恢复OCR到新的磁盘组（注意提前更改ocr.loc）
#./ocrconfig -restore /u01/11.2.0/grid/cdata/rac-cluster/backup_20170801_023201.ocr
[root@rac02 bin]# ./ocrconfig -manualbackup
rac01 2017/08/03 06:47:10 /u01/11.2.0/grid/cdata/rac-cluster/backup_20170803_064710.ocr
rac02 2017/08/01 02:32:01 /u01/11.2.0/grid/cdata/rac-cluster/backup_20170801_023201.ocr
5、恢复votedisk
[root@rac02 bin]# ./crsctl replace votedisk +CRS
[root@rac02 bin]# ./ocrconfig -restore /u01/11.2.0/grid/cdata/rac-cluster/backup_20170801_023201.ocr
[root@rac02 bin]# ./crsctl replace votedisk +CRS
Successful addition of voting disk 99fc4fb627ab4ffabfa4819288ef362d.
Successful addition of voting disk 69c39aef708f4f0abf39c97b4c55dcea.
Successful addition of voting disk 6bef23769bae4f5fbfb594f99707b160.
Successful deletion of voting disk 264b8b526ac54fe9bf80c5eee1350526.
Successfully replaced voting disk group with +CRS.
CRS-4266: Voting file(s) successfully replaced
检查
ocrcheck---------------------------------------------检查结果未变化
crsctl query css votedisk
[root@rac02 bin]# ./ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 3
Total space (kbytes) : 262120
Used space (kbytes) : 3480
Available space (kbytes) : 258640
ID : 1128199232
Device/File Name : +DATA
Device/File integrity check succeeded
Device/File not configured
Device/File not configured
Device/File not configured
Device/File not configured
Cluster registry integrity check succeeded
Logical corruption check succeeded
[root@rac02 bin]# ./crsctl query css votedisk
## STATE File Universal Id File Name Disk group
-- ----- ----------------- --------- ---------
1. ONLINE 99fc4fb627ab4ffabfa4819288ef362d (/dev/asm-orctest1) [CRS]
2. ONLINE 69c39aef708f4f0abf39c97b4c55dcea (/dev/asm-orctest2) [CRS]
3. ONLINE 6bef23769bae4f5fbfb594f99707b160 (/dev/asm-orctest3) [CRS]
Located 3 voting disk(s).
6、删除掉原来
./ocrconfig -delete +DATA
然后重启集群