oracle12c r2 dg,oracle 11gR2 对CRS dg做镜像dg

oracle 11gR2 开始ocr和vote盘全部放在磁盘组中，不象以前版本，ocr盘两个vote盘三个，所以为了提高11gR2的

高可用性，oracle建议对crs 磁盘组做镜像dg,以下是做镜像dg具体实操步骤：

1.创建镜像diskgroup

----新建一个CRS 镜像DG crsdg_bak(新建的CRS镜像DG，LUN的大小必须与原有的CRS DG的LUN一样大小)

节点1创建

su - grid

sqlplus "/as sysasm"

create diskgroup crsdg_bak external redundancy add disk '/dev/rhdiskpower17';

更改对应属性

alter diskgroup crsdg_bak set attribute 'COMPATIBILITY.ASM'='11.2';

alter diskgroup crsdg_bak set attribute 'COMPATIBILITY.RDBMS'='11.2';

节点2 加载

su - grid

sqlplus "/as sysasm"

alter diskgroup crsdg_bak  mount;

2.开始对原crs dg做镜像dg

用roo用户

[nhdb15:root]cd /software/grid/product/11.2.0/bin

./ocrconfig -add +CRSDG_BAK

3.检查结果

cat /etc/oracle/ocr.loc

Status of Oracle Cluster Registry is as follows :

Version:3

Total space (kbytes):262120

Used space (kbytes):3200

Available space (kbytes) :258920

ID:997463125

Device/File Name:+CRSDG

Device/File integrity check succeeded

Device/File Name:+CRSDG_BAK

Device/File integrity check succeeded

Device/File not configured

Device/File not configured

Device/File not configured

Cluster registry integrity check succeeded

对crsdg做镜像完毕