ASM磁盘扩容

1.操作前查询
# oracleasm listdisks
查看asm磁盘
SQL>select group_number,name,TOTAL_MB, FREE_MB from v$asm_diskgroup;

2.添加磁盘
节点1对磁盘进行分区
# fdisk /dev/sdd
n
p
1
default
default
w
创建ASM磁盘
# /etc/init.d/oracleasm createdisk arch2 /dev/sdd1 
# /etc/init.d/oracleasm listdisks
# /etc/init.d/oracleasm scandisks
另一个节点同步磁盘信息
#ll /dev/sd*
#partprobe sd*
另一个节点磁盘确认
#/etc/init.d/oracleasm scandisks
#/etc/init.d/oracleasm listdisks


SQL>alter diskgroup arch check norepair;
--添加ARCH磁盘之前,进行检测
SUCCESS: check of diskgroup ARCH found no errors
SUCCESS: alter diskgroup arch check norepair
官方文档
The CHECK keyword performs the following operations:
Checks the consistency of the disk.
Cross checks all the file extent maps and allocation tables for consistently.
Checks that the alias metadata directory and file directory are linked correctly.
Checks that the alias directory tree is linked correctly.
Checks that Oracle ASM metadata directories do not have unreachable allocated blocks.
REPAIR | NOREPAIR 
This clause lets you instruct Oracle ASM whether or not to attempt to repair any errors found during the consistency check.
    The default is NOREPAIR.
The NOREPAIR setting is useful if you want to be alerted to  any inconsistencies but do not want Oracle ASM to take any 
    automatic action to resolve them.
----
$sqlplus / as sysasm
SQL>
alter diskgroup ARCH add disk ‘/dev/oracleasm/disks/ARCH2‘ rebalance power 0;
alter diskgroup ARCH add disk ‘/dev/oracleasm/disks/ARCH2‘ rebalance power 0;
alter diskgroup ARCH rebalance power 11; 


--查询验证
ASMCMD> lsdg

检查确认
查询asm_alert日志；
查询db_alert日志；
SQL> select group_number,disk_number,library,name,path from v$asm_disk where PATH like ‘/dev/oracleasm/disks/arch%‘
 order by PATH desc; 
SQL> select group_number,name,total_mb/1024 TOTAL_GB,free_mb/1024 FREE_GB,free_mb/total_mb*100 free_percent,state,TYPE
from v$ASM_DISKGROUP;