ASM之创建ASM实例时的常见故障

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1.创建磁盘时出现错误可以查看asm日志
tail -f /var/log/oracleasm

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2.启动asm实例时出现ORA-29701错误
ORA-29701: unable to connect to Cluster Manager

首次需要启用css服务，使用root帐户,运行$ORACLE_HOME/bin/localconfig add
如果下次启动实例的时候仍然碰到如下报错：
ORA-29701: unable to connect to Cluster Manager
那么检查/etc/inittab 文件，看看是否有下面这行 h1:35:respawn:/etc/init.d/init.cssd run >/dev/null 2>&1 如果没有请添加，如果被注释了请取消注释(root帐户)。 也可以使用root帐户执行/u01/oracle/10g/bin/localconfig reset来解决

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3.磁盘搜索路径问题
SQL> create diskgroup DG1 normal redundancy disk 'ORCL:VOL1','ORCL:VOL2';

create diskgroup DG1 normal redundancy disk 'ORCL:VOL1','ORCL:VOL2' * ERROR at line 1:
ORA-15018: diskgroup cannot be created ORA-15031: disk specification 'ORCL:VOL2' matches no disks
ORA-15031: disk specification 'ORCL:VOL1' matches no disks

使用oraclasm创建磁盘后，缺省会在/dev/oracleasm/disks目录下添加刚刚创建的磁盘映射
修改asm_diskstring修改路径之后再次创建即可
alter system set asm_diskstring='/dev/oracleasm/disks/VOL*'