本例是基于ASMLib创建, 也可以基于裸设备创建.

1.安装asm所需要的支持包
A.在Oracle网站下载支持包：这里
B.根据linux内核下载相应的asm安装包:

oracleasm-2.6.18-8.el5-2.0.4-1.el5.i686.rpm
oracleasm-2.6.18-8.el5PAE-2.0.4-1.el5.i686.rpm
oracleasm-2.6.18-8.el5xen-2.0.4-1.el5.i686.rpm
oracleasmlib-2.0.3-1.el5.i386.rpm
oracleasm-support-2.0.4-1.el5.i386.rpm
C.安装 rpm -Uvh .......... --nodeps

# cd /orahome/wangnc/asmlib

# rpm -Uvh oracleasm-support-2.1.3-1.el4.i386.rpm oracleasm-2.6.9-55.ELsmp-2.0.3-1.i686.rpm oracleasmlib-2.0.4-1.el4.i386.rpm

# /etc/init.d/oracleasm configure

...

Default user to own the driver interface []: oracle

Default group to own the driver interface []: dba

Start Oracle ASM library driver on boot (y/n) [n]: y

Scan for Oracle ASM disks on boot (y/n) [y]: y

...

# df -ha | grep oracleasm

oracleasmfs               0      0      0    -   /dev/oracleasm

附启用或禁用oracleasm自动启动方法:

# /etc/init.d/oracleasm disable

# /etc/init.d/oracleasm enable

对用来做ASM 的硬盘要进行分区(只分一个区, 此处采用硬盘sdb):

# fdisk -l | grep Disk

Disk /dev/sda: 250.0 GB, 250059350016 bytes

Disk /dev/sdb: 250.0 GB, 250059350016 bytes

# fdisk /dev/sdb

Command (m for help): n

p

Partition number (1-4): 1

First cylinder (1-30401, default 1):

Last cylinder or +size or +sizeM or +sizeK (1-30401, default 30401):

Command (m for help): w

# fdisk -l /dev/sdb

Disk /dev/sdb: 250.0 GB, 250059350016 bytes

255 heads, 63 sectors/track, 30401 cylinders

Units = cylinders of 16065 * 512 = 8225280 bytes

    Device Boot       Start          End       Blocks    Id   System

/dev/sdb1                1        30401    244196001    83   Linux

这些磁盘是不包含任何内容的空磁盘, 创建时物理磁盘要带分区号如sdb1.  

ASM磁盘名可以为大写字母,数字和下划线, 且以字母开始:

# /etc/init.d/oracleasm createdisk VOL1 /dev/sdb1

Marking disk "VOL1" as an ASM disk:                        [   OK   ]

如果提示Failed, 可以跟踪日志:

# tail -f /var/log/oracleasm

附删除磁盘语句:

# /etc/init.d/oracleasm deletedisk VOL1

检查配置情况:

# /etc/init.d/oracleasm querydisk VOL1

# /etc/init.d/oracleasm querydisk /dev/sdb1

# /etc/init.d/oracleasm listdisks

# ls -l /dev/oracleasm/disks/*

# /etc/init.d/oracleasm status

注意asm_diskstring必需配置成'ORCL:'开头.

# su - oracle

$ export ORACLE_SID=+ASM

$ vi $ORACLE_HOME/dbs/init$ORACLE_SID.ora

asm_diskstring='ORCL:VOL*'

background_dump_dest='/u01/app/oracle/admin/+ASM/bdump'

core_dump_dest='/u01/app/oracle/admin/+ASM/cdump'

user_dump_dest='/u01/app/oracle/admin/+ASM/udump'

instance_type='asm'

large_pool_size=12M

remote_login_passwordfile='SHARED'

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