(1)备份数据库之后,停止数据库,使用dbca删除数据库
(2)移除diskgroup
进入节点2:export ORACLE_SID=+ASM2
sqlplus/ as sysdba
Alter diskgroup dgdata dismount;
进入节点1:export ORACLE_SID=+ASM1
先将数据文件删除,否则drop的时候会报错
asmcmd
rm –rf *
sqlplus / as sysdba
drop diskgroup dgdata;
(3)停止crs,并且使crs开机不自启动,两个节点分别用root用户执行
./crsctldisable crs
./crsctlstop crs
(4)导出ocr盘和vote盘数据,做备份./ocrconfig–export /oracle/product/ocr.exp
dd if=/dev/raw/raw3 of=/oracle/product/vote1.exp
dd if=/dev/raw/raw4 of=/oracle/product/vote2.exp
dd if=/dev/raw/raw5 of=/oracle/product/vote3.exp
(5)注释掉/etc/rc.local中格式化裸设备及给裸设备赋予权限的脚本。此时有很多oracle的进程运行,重启服务器,因为crs开机启动disabled了,重启之后,oracle进程就不会运行了
(6)进入系统,移除共享盘。例如lvremove/dev/DATA/lv_ocr1,…. vgremove DATA, pvremove /dev/mapper/mpath
(7)存储器中删掉LUN
pvcreate
vgcreate DATA /dev/mapper/
lvcreate
(2)修改rc.local配置裸设备的脚本,并且重启服务
(3)向raw1 raw2中加载ocr数据:
[root@ts01 bin]# ./ocrconfig -restore /oracle/product/ocr.exp
导入之后,验证
[root@ts01 bin]# ./ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 1023728
Used space (kbytes) : 3860
Available space (kbytes) : 1019868
ID :2144682474
Device/File Name :/dev/raw/raw1
Device/Fileintegrity check succeeded
Device/File Name :/dev/raw/raw2
Device/Fileintegrity check succeeded
Cluster registry integrity check succeeded
(4)此时ocr注册表正常,检查votedisk位置[root@ts01 bin]# ./crsctl query css votedisk
0. 0 /dev/raw/raw3
1. 0 /dev/raw/raw4
2. 0 /dev/raw/raw5
(5)导入votedisk备份数据root@ts01 bin]#dd if=/oracle/product/vot1.exp of=/dev/raw/raw3
2048000+0records in
2048000+0records out
1048576000 bytes(1.0 GB) copied, 417.17 seconds, 2.5 MB/s
[root@ts01 bin]#dd if=/oracle/product/vot2.exp of=/dev/raw/raw4
2048000+0records in
2048000+0records out
1048576000 bytes(1.0 GB) copied, 421.286 seconds, 2.5 MB/s
[root@ts01 bin]#dd if=/oracle/product/vot3.exp of=/dev/raw/raw5
2048000+0records in
2048000+0records out
1048576000 bytes(1.0 GB) copied, 422.608 seconds, 2.5 MB/s
(6)两个节点分别执行启动crs,和设置开机允许启动crs[root@ts01 bin]# ./crsctl enable crs
[root@ts01 bin]# ./crsctl start crs
Attempting to start CRS stack
The CRS stack will be started shortly
(7)几分钟之后查看各项服务crs_stat–t
(8)运行dbca建立数据库
(9)ASM实例已经存在了,之前的diskgroup已经被删除,重新配置新diskgroup即可。