Oracle ASM disk

oracle 10g 引入 asm，oracle用户通过磁盘组来直接管理disk，绕过底层的操作系统。

1.去oracle官方网站下载kernel对应的oracleasm 包

rpm -ivh oracleasm-support-2.1.7-1.el5.i386.rpm oracleasm-2.6.18-194.el5-2.0.5-1.el5.i686.rpm oracleasmlib-2.0.4-1.el5.i386.rpm

2.配置

# /usr/sbin/oracleasm configure -i
Configuring the Oracle ASM library driver.

This will configure the on-boot properties of the Oracle ASM library
driver.  The following questions will determine whether the driver is
loaded on boot and what permissions it will have.  The current values
will be shown in brackets ('[]').  Hitting <ENTER> without typing an
answer will keep that current value.  Ctrl-C will abort.

Default user to own the driver interface []: grid
Default group to own the driver interface []: asmadmin
Start Oracle ASM library driver on boot (y/n) [n]: y
Scan for Oracle ASM disks on boot (y/n) [y]: y
Writing Oracle ASM library driver configuration: done

[root@julia01 public]# /usr/sbin/oracleasm init
Creating /dev/oracleasm mount point: /dev/oracleasm
Loading module "oracleasm": oracleasm
Mounting ASMlib driver filesystem: /dev/oracleasm

3.  asm磁盘

Oracle ASM disks are the storage devices that are provisioned to Oracle ASM disk groups. Examples of Oracle ASM disks include:

    A disk or partition from a storage array

    An entire disk or the partitions of a disk

    Logical volumes

    Network-attached files (NFS)

4.Oracle recommends that you create a single whole-disk partition on each disk

   fdisk /dev/sdf

  创建一个分区就可以了

5.oracleasm createdisk DISK-name /dev/sdf1

[root@julia01 disks]# /usr/sbin/oracleasm createdisk DISK1 /dev/sdf1
Writing disk header: done
Instantiating disk: done

oracleasm listdisks  查看磁盘是否已经标记为oracle asm 磁盘。

6.创建磁盘组

在asm的sqlplus下创建比较容易
>create diskgroup DG1  normal/external/high redundancy disk 'ORCL:DISK3','ORCL:DISK4' ;

7.向磁盘组中添加磁盘

> alter diskgroup sysdb add disk 'ORCL:DISK6';

8.drop掉磁盘组中的磁盘

>alter diskgroup dg1 drop disk DISK4;