案例背景：因安装集群时候使用的 OCR 磁盘组存储有问题，需要迁移到新的磁盘组。

涉及 文件有：
1）OCR 文件
2）VOTING 文件
3）ASM 实例的 spfile 文件

旧 OCR 磁盘组名称：+OCR
新 OCR 磁盘组名称：+GRID

1、迁移 OCR 文件
grid@pgylinux01-or@+ASM1> ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       3604
         Available space (kbytes) :     258516
         ID                       : 1076986448
         Device/File Name         :       +ocr
                                    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 bypassed due to non-privileged user
此时 OCR 文件在 OCR 磁盘组中

迁移 OCR 文件有两种方式：
方法一：添加一个新位置，删除旧位置
[root@pgylinux01-or bin]# /oracle/grid/11.2.0.4/bin/ocrconfig -add +grid

# 查看OCR 盘路径
grid@pgylinux01-or@+ASM1>ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          3
         Total space (kbytes)     :     262120
         Used space (kbytes)      :       3600
         Available space (kbytes) :     258520
         ID                       : 1076986448
         Device/File Name         :       +ocr
                                    Device/File integrity check succeeded
         Device/File Name         :      +grid
                                    Device/File integrity check succeeded

                                    Device/File not configured

                                    Device/File not configured

                                    Device/File not configured

         Cluster registry integrity check succeeded

         Logical corruption check bypassed due to non-privileged user

也可以通过查看/etc/oracle/ocr.loc 文件来确认 OCR 文件路径
oracle@pgylinux01-or@+ASM1> cat /etc/oracle/ocr.loc
#Device/file  getting replaced by device +grid
ocrconfig_loc=+ocr
ocrmirrorconfig_loc=+grid

这时候 OCR 文件在 +OCR 和 +GRID 磁盘组各存了一份，可以删除 +OCR 盘里面的那一份
[root@pgylinux01-or bin]# /oracle/grid/11.2.0.4/bin/ocrconfig -delete +ocr

方法二：使用 replace 方式直接替换
[root@pgylinux01-or bin]# /oracle/grid/11.2.0.4/bin/ocrconfig -replace +ocr -replacement +grid
PROT-28: Cannot delete or replace the only configured Oracle Cluster Registry location

提示说 当前只有一份 OCR 文件，不能做删除和替换操作，需要先添加一份OCR文件，再做替换，添加到哪个盘都可以，这里直接使用 +GRID 盘。
[root@pgylinux01-or bin]# /oracle/grid/11.2.0.4/bin/ocrconfig -add +grid

[root@pgylinux01-or bin]# /oracle/grid/11.2.0.4/bin/ocrconfig -replace +ocr -replacement +grid
PROT-29: The Oracle Cluster Registry location is already configured

替换完成，OCR 文件已经转移到 +GRID 磁盘组中。

2、迁移 VOTING 文件
# 查看当前 VOTING 文件路径
grid@pgylinux01-or@+ASM1> crsctl query css votedisk
##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   0de070fb41ae4f30bfd17c9dc7668f01 (ORCL:DATA_01) [OCR]
Located 1 voting disk(s).

# 替换 VOTING 文件到 +GRID 磁盘组
grid@pgylinux01-or@+ASM1> crsctl replace votedisk +grid
Successful addition of voting disk 53e1a6d5ebf84f41bf22d54601a9028f.
Successful deletion of voting disk 0de070fb41ae4f30bfd17c9dc7668f01.
Successfully replaced voting disk group with +grid.
CRS-4266: Voting file(s) successfully replaced

grid@pgylinux01-or@+ASM1>crsctl query css votedisk
##  STATE    File Universal Id                File Name Disk group
--  -----    -----------------                --------- ---------
 1. ONLINE   53e1a6d5ebf84f41bf22d54601a9028f (ORCL:DATA_03) [GRID]
Located 1 voting disk(s).

替换完成，VOTING 文件已经转移到 +GRID 磁盘组中。

3、重建 ASM 实例的 spfile 文件
SQL> CREATE PFILE='/home/grid/asm_pfile.ora' from spfile;

File created.

SQL> CREATE SPFILE='+GRID' FROM PFILE='/home/grid/asm_pfile.ora';

File created.

所有文件迁移完成，重启集群完成迁移。旧的 OCR 磁盘组不再需要，可以删除。