替换OCR磁盘组的步骤

1、添加新存储

2、多路径绑定配置

3、ASMLib 配置或udev绑定

4、备份OCR

5、新建OCR卷组

6、替换VOTE在其中一个节点，root用户下执行：

[root]# crsctl query css votedisk   -----修改前确认表决磁盘的位置
        ##  STATE    File Universal Id                File Name Disk group
        -  -----    -----------------                --------- ---------
        1. ONLINE   904eec4b28014f51bf5c23fbdb330aef (/dev/asm-disk1) [OCR]
        Located 1 voting disk(s).
[root@cwhxdb2 bin]# crsctl replace votedisk +FRA
        Successful addition of voting disk 8324947e1f494f06bf6c01f6bd5940c9.
        Successful deletion of voting disk 904eec4b28014f51bf5c23fbdb330aef.
        Successfully replaced voting disk group with +FRA.
        CRS-4266: Voting file(s) successfully replaced
[root@cwhxdb2 bin]# ./crsctl query css votedisk    -----修改后确认表决磁盘的位置
        ##  STATE    File Universal Id                File Name Disk group
        --  -----    -----------------                --------- ---------
        1. ONLINE   8324947e1f494f06bf6c01f6bd5940c9 (/dev/asm-disk5) [FRA]

7、替换OCR 在grid或root用户下执行，只需要在一个节点上操作即可

主要命令：

ocrconfig -add +newocr
more /etc/oracle/ocr.loc
ocrconfig -delete +ocr
more /etc/oracle/ocr.loc
ocrcheck

[root@cwhxdb2 bin]# ./ocrconfig -add +fra
[root@cwhxdb2 bin]# more /etc/oracle/ocr.loc
        #Device/file  getting replaced by device +fra 
        ocrconfig_loc=+OCR
        ocrmirrorconfig_loc=+fra
        local_only=false
[root@cwhxdb2 bin]# ocrconfig -delete +ocr
[root@cwhxdb2 bin]# ocrcheck
        Status of Oracle Cluster Registry is as follows :
        Version                  :          3
        Total space (kbytes)     :     262120
        Used space (kbytes)      :       2948
        Available space (kbytes) :     259172
        ID                       :  495741472
        Device/File Name         :       +fra
        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     
[root@cwhxdb2 bin]# more /etc/oracle/ocr.loc
        #Device/file +OCR getting replaced by device +fra 
        ocrconfig_loc=+fra
        local_only=false

8、迁移ASM Spfile   （和实例的spfile是两码事）grid用户执行

[root]# su - grid 
[root]# asmcmd
    >spget    ----找到ASM spfile的位置
    >spcopy -u +OCR/rac-scan/asmparameterfile/registry.253.1050699607 +FRA/rac-scan/asmparameterfile/spfileasm.ora
    >spset +FRA/rac-scan/asmparameterfile/registry.253.1050699607
#[grid@cwhxdb1 ~]$ asmcmd
     ASMCMD> spget
     +OCR/rac-scan/asmparameterfile/registry.253.1050699607
     ASMCMD> spcopy -u +OCR/rac-scan/asmparameterfile/registry.253.1050699607 +FRA/rac-scan/asmparameterfile/spfileasm.ora
     ASMCMD> spset +FRA/rac-scan/asmparameterfile/spfileasm.ora
     ASMCMD> spget
     +FRA/rac-scan/asmparameterfile/spfileasm.ora

 9、确认老的OCR磁盘组是否还有其他文件

ASMCMD> cd ocr
ASMCMD> ls
rac-scan/
ASMCMD> cd ra*
ASMCMD> ls
ASMPARAMETERFILE/
OCRFILE/
ASMCMD> cd asm*
ASMCMD> ls
REGISTRY.253.1050699607    #### 不用管，已迁移
ASMCMD> cd ..
ASMCMD> ls
ASMPARAMETERFILE/
OCRFILE/
ASMCMD> cd ocrfile
ASMCMD> ls
REGISTRY.255.1050699611    #### 不用管，已迁移

10、删除老OCR卷组

在节点1和节点2分别重启集群

crsctl stop crs
crsctl start crs

 节点2：

su - grid
sqlplus / as sysasm
alter diskgroup OCR dismount;
exit

节点1：

su - grid
sqlplus / as sysasm
drop diskgroup ocr;  ------看执行结果，不行就执行下一条命令
drop diskgroup OCR INCLUDING CONTENTS;  ------看执行结果，不行就执行下一条命令
drop diskgroup OCR FORCE INCLUDING CONTENTS;  

11、删除磁盘

任意一节点ROOT用户下操作：

/usr/sbin/oracleasm dropdisk OCR

 删除多路径绑定配置，删除配置/etc/multipatch.conf中原有OCR盘内容

最后从存储上删除2个节点的映射。

12、删除crs记录

crsctl delete res ora.OCR.dg