Disk /dev/emcpoweree: 2147.4 GB, 2147483648000 bytes
255 heads, 63 sectors/track, 261083 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/emcpoweree1 1 60789 488287611 83 Linux
/dev/emcpoweree2 60790 121578 488287642+ 83 Linux
/dev/emcpoweree3 121579 182367 488287642+ 83 Linux

Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Selected partition 4
First cylinder (182368-261083, default 182368):
Using default value 182368
Last cylinder or +size or +sizeM or +sizeK (182368-261083, default 261083):
Using default value 261083

Command (m for help): p

Disk /dev/emcpoweree: 2147.4 GB, 2147483648000 bytes
255 heads, 63 sectors/track, 261083 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/emcpoweree1 1 60789 488287611 83 Linux
/dev/emcpoweree2 60790 121578 488287642+ 83 Linux
/dev/emcpoweree3 121579 182367 488287642+ 83 Linux
/dev/emcpoweree4 182368 261083 632286270 83 Linux

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.
Syncing disks.

以上，完成了对该磁盘分区。分四个主分区，3个500G，剩余最后部分一个区。

查看asm磁盘列表

[root@gzxkdb1 ~]# service oracleasm listdisks
ARCH
DATA1
DATA2
VOTE_CRS1
VOTE_CRS2
VOTE_CRS3
创建asm磁盘
[root@gzxkdb1 ~]# service oracleasm createdisk DATA3 /dev/emcpoweree1
Marking disk "DATA3" as an ASM disk: [ OK ]
[root@gzxkdb1 ~]# service oracleasm createdisk DATA4 /dev/emcpoweree2
Marking disk "DAT43" as an ASM disk: [ OK ]
[root@gzxkdb1 ~]# service oracleasm createdisk DATA5 /dev/emcpoweree3
Marking disk "DATA5" as an ASM disk: [ OK ]
[root@gzxkdb1 ~]# service oracleasm createdisk DATA6 /dev/emcpoweree4
Marking disk "DATA6" as an ASM disk: [ OK ]

在另外一个节点，对新添加的磁盘进行扫描
[root@gzxkdb2 ~]# service oracleasm scandisks //节点2上完成扫描磁盘
[root@gzxkdb2 ~]# service oracleasm listdisks
ARCH
DATA4
DATA1
DATA2
DATA3
DATA5
DATA6
VOTE_CRS1
VOTE_CRS2
VOTE_CRS3

在节点1，用sysasm用户进行登录实例
[grid@gzxkdb1 ~]$ sqlplus '/as sysasm'

SQL*Plus: Release 11.2.0.3.0 Production on Mon Aug 3 17:48:58 2015

Copyright (c) 1982, 2011, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options

查看asm磁盘情况
SQL> set linesize 200
SQL> set pagesize 200
SQL> col NAME for a30
SQL> col PATH for a50
SQL> r
1* select name,path,mode_status,state,disk_number,failgroup from v$asm_disk

NAME PATH MODE_ST STATE DISK_NUMBER FAILGROUP
------------------------------ -------------------------------------------------- ------- -------- ----------- ------------------------------
/dev/oracleasm/disks/DATA6 ONLINE NORMAL 0
/dev/oracleasm/disks/DATA5 ONLINE NORMAL 1
/dev/oracleasm/disks/DATA4 ONLINE NORMAL 2
/dev/oracleasm/disks/DATA3 ONLINE NORMAL 3
ARCH_0000 /dev/oracleasm/disks/ARCH ONLINE NORMAL 0 ARCH_0000
CRS_0002 /dev/oracleasm/disks/VOTE_CRS3 ONLINE NORMAL 2 CRS_0002
CRS_0001 /dev/oracleasm/disks/VOTE_CRS2 ONLINE NORMAL 1 CRS_0001
DATA_0001 /dev/oracleasm/disks/DATA2 ONLINE NORMAL 1 DATA_0001
DATA_0000 /dev/oracleasm/disks/DATA1 ONLINE NORMAL 0 DATA_0000
CRS_0000 /dev/oracleasm/disks/VOTE_CRS1 ONLINE NORMAL 0 CRS_0000

10 rows selected.

批量扩容ASM磁盘组
SQL> alter diskgroup DATA add disk '/dev/oracleasm/disks/DATA3' rebalance 10;

Diskgroup altered.