由于后文会相关的演示操作会用到ASM实例，因此在文章的开始就先创建一个简单的ASM实例，后面再开始详细的介绍ASM。
下面是创建一个ASM Instance的具体操作过程：
创建ASM实例的相关目录
[Oracle@gtser1~]$ mkdir -p $ORACLE_BASE/admin/+ASM/bdump
[oracle@gtser1~]$ mkdir -p $ORACLE_BASE/admin/+ASM/cdump
[oracle@gtser1~]$ mkdir -p $ORACLE_BASE/admin/+ASM/hdump
[oracle@gtser1~]$ mkdir -p $ORACLE_BASE/admin/+ASM/pfile
[oracle@gtser1~]$ mkdir -p $ORACLE_BASE/admin/+ASM/udump
准备pfile的初始化参数
[oracle@gtser1~]$ vi /tmp/init+ASM.ora
INSTANCE_TYPE=ASM
"/tmp/init+ASM.ora"6L, 225C 已写入
[oracle@gtser1~]$ cat /tmp/init+ASM.ora
INSTANCE_TYPE=ASM
*.instance_name='+ASM'
*.asm_diskstring='/dev/raw/raw*'
background_dump_dest=/u01/oracle/10g/admin/+ASM/bdump
core_dump_dest=/u01/oracle/10g/admin/+ASM/cdump
user_dump_dest=/u01/oracle/10g/admin/+ASM/udump
启动ASM实例
[oracle@gtser1~]$ export ORACLE_SID=+ASM
[oracle@gtser1~]$ sqlplus "/as sysdba"
SQL*Plus:Release 10.2.0.5.0 - Production on Sat Feb 23 15:20:17 2013
Copyright(c) 1982, 2010, Oracle. All RightsReserved.
Connectedto an idle instance.
SQL>startup pfile='/tmp/init+ASM.ora'
ASMinstance started
TotalSystem Global Area 125829120 bytes
FixedSize 2094512 bytes
VariableSize 98568784 bytes
ASMCache 25165824 bytes
ORA-15110:no diskgroups mounted
创建spfile
SQL>create spfile from pfile;
createspfile from pfile
*
ERROR atline 1:
ORA-01078:failure in processing system parameters
LRM-00109:could not open parameter file
'/u01/oracle/10g/product/10.2.0/db_1/dbs/init+ASM.ora'
SQL>create spfile from pfile='/tmp/init+ASM.ora';
Filecreated.
查看实例信息
SQL>select instance_name,host_name,version,database_status from v$instance;
INSTAHOST_NAM VERSION DATABASE
------------- ---------- --------
+ASM gtser1 10.2.0.5.0 ACTIVE
查看磁盘信息
GROUP_NUMBERDISK_NUMBER NAME HEADER_STATUS FAILGROUP CREATE_DATE PATH
----------------------- ----- ------------------------ --------- ----------------------------
0 0 CANDIDATE /dev/raw/raw4
0 1 CANDIDATE /dev/raw/raw2
0 2 CANDIDATE /dev/raw/raw3
0 0 CANDIDATE /dev/raw/raw1
查看磁盘组信息
SQL>select group_number,name,state,type,total_mb,free_mb from v$asm_diskgroup orderby 1,2;
no rowsselected
SQL>exit
Disconnectedfrom Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - 64bitProduction
With thePartitioning, OLAP, Data Mining and Real Application Testing options