环境说明： 操作系统：CentOS 5 x86数据库：Oracle 10.2.0.1 非RAC环境ASM实例名：+ASM
环境说明：
操作系统：CentOS 5 x86
数据库：Oracle 10.2.0.1 非RAC环境
ASM实例名：+ASM
参考：metalink node:311350.1
1、检查ASM实例进程
@oracle[/home/oracle]> ps -ef|grep asm|grep -v grep
oracle 4263 1 0 Jan20 ? 00:00:02 asm_pmon_+ASM
oracle 4265 1 0 Jan20 ? 00:00:00 asm_psp0_+ASM
oracle 4267 1 0 Jan20 ? 00:00:00 asm_mman_+ASM
oracle 4269 1 0 Jan20 ? 00:00:00 asm_dbw0_+ASM
oracle 4271 1 0 Jan20 ? 00:00:00 asm_lgwr_+ASM
oracle 4273 1 0 Jan20 ? 00:00:00 asm_ckpt_+ASM
oracle 4275 1 0 Jan20 ? 00:00:00 asm_smon_+ASM
oracle 4277 1 0 Jan20 ? 00:00:00 asm_rbal_+ASM
oracle 4279 1 0 Jan20 ? 00:00:06 asm_gmon_+ASM
2、设置ASM实例名
@oracle[/home/oracle]> export ORACLE_SID=+ASM
3、检查是否有实例在使用ASM
@oracle[/home/oracle]> sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Thu Jan 21 08:44:03 2010
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
idle> select instance_name from v$asm_client;
no rows selected
如果有实例在使用ASM，，需要首先停止这些相关的实例，并备份相关的datafile、controlfile等
4、检查ASM实例上的diskgroup
idle> select name from v$asm_diskgroup;
NAME
------------------------------
DATA
5、删除检查到ASM实例上的diskgroup
idle> drop diskgroup data including contents;
Diskgroup dropped.
6、关闭ASM实例
idle> shutdown
ORA-15100: invalid or missing diskgroup name
ASM instance shutdown
idle> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
7、从css中删除ASM实例信息
@oracle[/home/oracle]> oradism -delete -asmsid +ASM
8、删除ASM实例相关的spfile、pfile等文件
@oracle[/home/oracle]> cd $ORACLE_HOME/dbs
@oracle[/oracle/app/10.1/dbs]> rm -f *+ASM*
@oracle[/oracle/app/10.1/dbs]> cd $ORACLE_BASE/admin
@oracle[/oracle/admin]> rm -rf +ASM
9、删除/etc/oratab文件中的ASM实例相关行
删除/etc/oratab文件中的如下行
其实删除oracle 实例同样要查出该文件的内容
+ASM:/oracle/app/10.1:Y
10、用root用户删除cssd服务
@root[/oracle/app/10.1/bin]> ./localconfig delete
Stopping CSSD.
Shutting down CSS daemon.
Shutdown request successfully issued.
Shutdown has begun. The daemons should exit soon.
11、清除ASM使用的设备的文件头信息
@oracle[/home/oracle]> cd /dev/raw/
@oracle[/dev/raw]> ls -l *
crw------- 1 oracle oinstall 162, 1 Jan 21 08:45 raw1
crw------- 1 oracle oinstall 162, 2 Jan 21 08:45 raw2
crw------- 1 oracle oinstall 162, 3 Jan 21 08:45 raw3
@oracle[/dev/raw]> dd if=/dev/zero of=/dev/raw/raw1 bs=1024 count=10
10+0 records in
10+0 records out
10240 bytes (10 kB) copied, 0.00396028 seconds, 2.6 MB/s
@oracle[/dev/raw]> dd if=/dev/zero of=/dev/raw/raw2 bs=1024 count=10
10+0 records in
10+0 records out
10240 bytes (10 kB) copied, 0.00485093 seconds, 2.1 MB/s
@oracle[/dev/raw]> dd if=/dev/zero of=/dev/raw/raw3 bs=1024 count=10
10+0 records in
10+0 records out
10240 bytes (10 kB) copied, 0.00532261 seconds, 1.9 MB/s
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