bootinfo –s hdisk8
移除已经创建好的数据库，删除asm卷组及磁盘：
p7402:/home/oracle$export ORACLE_SID=+ASM2
p7402:/home/oracle$sqlplus / as sysdba
SQL> select instance_name from v$instance;
INSTANCE_NAME
--------------------------------
+ASM2
SQL> shutdown immediate
ASM diskgroups dismounted
ASM instan
停止实例2（+ASM2）后连接到实例（+ASM1）将卷组删除
p7401:/home/oracle$export ORACLE_SID=+ASM1
p7401:/home/oracle$sqlplus / as sysdba
SQL> select instance_name from v$instance;
INSTANCE_NAME
--------------------------------
+ASM1
SQL> show parameter spfile
NAME TYPE VALUE
------------------------------
spfile string
SQL> drop diskgroup NCDATA including contents;
Diskgroup dropped.
SQL>
SQL> select name from v$asm_diskgroup;
no rows selected
SQL> shutdown
ORA-15100: invalid or missing diskgroup name
ASM instance shutdown
SQL> exit
[oracle@node1 ~]$ oradism -delete -asmsid +ASM
[oracle@node1 ~]$ oradism -delete -asmsid +ASM1
[oracle@node1 ~]$ oradism -delete -asmsid +ASM2
p7401:/oracle/admin$vi /etc/oratab
+ASM1:/oracle/db /10.2/db_1:N
p7401:/oracle/admin$srvctl remove asm -n p7401 -i ASM1
p7401:/oracle/admin$srvctl remove asm -n p7402 -i ASM2
p7401:/oracle/admin$crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora....01.lsnr application ONLINE ONLINE p7401
ora.p7401.gsd application ONLINE ONLINE p7401
ora.p7401.ons application ONLINE ONLINE p7401
ora.p7401.vip application ONLINE ONLINE p7401
ora....02.lsnr application ONLINE ONLINE p7402
ora.p7402.gsd application ONLINE ONLINE p7402
ora.p7402.ons application ONLINE ONLINE p7402
ora.p7402.vip application ONLINE ONLINE p7402
重新LUN单个500G，如下
参考：
http://hi.baidu.com/faceok/blog/item/89c5cc81673df0d7bc3e1ea6.html
ASM存储系统有如下限制：
每个存储系统最多63个Disk groups
每个存储系统最多10，000个ASM disks
每个磁盘组最多1 Million 文件
为避免复杂性，建议不要超过2个磁盘组：
DATA : datafiles, control files, online redo logs
Flash recovery area : Control file，online redo log， archived redo log
ASM磁盘的大小限制： <= 2TB, 有例证如下：
SQL> create diskgroup FLASH_RECOVERY_AREA external redundancy disk 'ORCL:ASM5';
create diskgroup FLASH_RECOVERY_AREA external redundancy disk 'ORCL:ASM5'
*
ERROR at line 1:
ORA-15018: diskgroup cannot be created
ORA-15099: disk 'ORCL:ASM5' is larger than maximum size of 2097152 MBs
