Oracle 11g RAC 故障之--Instance 启动失败

系统环境：

操作系统：RedHat EL5.5

Cluster： GI 11.2.0.1.0

数据库软件：Oracle 11.2.0.1

故障现象：

添加新的node3的Instance 后，再启动Instance 时，出现以下故障。

[oracle@node3 dbs]$ sqlplus '/as sysdba'

sqlplus '/as sysdba'

SQL*Plus: Release 11.2.0.1.0 Production on Thu Apr 17 15:47:41 2014

Connected to an idle instance.

SYS@ prod3>startup nomount;

ORA-15081: failed to submit an I/O operation to a disk

告警日志：

ORACLE_BASE from environment = /u01/app/oracle

Errors in file /u01/app/oracle/diag/rdbms/pmydb/prod3/trace/prod3_rbal_16308.trc:

ORA-15183: ASMLIB initialization error [driver/agent not installed]

WARNING: FAILED to load library: /opt/oracle/extapi/32/asm/orcl/1/libasm.so

Errors in file /u01/app/oracle/diag/rdbms/pmydb/prod3/trace/prod3_rbal_16308.trc:

ORA-15183: ASMLIB initialization error [driver/agent not installed]

SUCCESS: diskgroup DG1 was mounted

USER (ospid: 16204): terminating the instance due to error 15081

NOTE: dependency between database pmydb and diskgroup resource ora.DG1.dg is established

Instance terminated by USER, pid = 16204

查看相关trace 文件：

[root@node3 node3]# tail /u01/app/oracle/diag/rdbms/pmydb/prod3/trace/prod3_rbal_16308.trc

*** 2014-04-17 15:47:55.374

*** SESSION ID:(11.1) 2014-04-17 15:47:55.374

*** CLIENT ID:() 2014-04-17 15:47:55.374

*** SERVICE NAME:() 2014-04-17 15:47:55.374

*** MODULE NAME:() 2014-04-17 15:47:55.374

*** ACTION NAME:() 2014-04-17 15:47:55.374

ERROR: asm_version error. err: driver/agent not installed rc:2

ORA-15183: ASMLIB initialization error [driver/agent not installed]

已经安装ASM相关的driver：

[root@node3 ~]# rpm -qa |grep asm

oracleasmlib-2.0.4-1.el5

oracleasm-support-2.1.3-1.el5

oracleasm-2.6.18-194.el5-2.0.5-1.el5

[root@node3 ~]# uname -a

Linux node1 2.6.18-194.el5 #1 SMP Tue Mar 16 21:52:43 EDT 2010 i686 i686 i386 GNU/Linux

查看Oracle 可执行文件：

[root@node3 asm]# ls -l /u01/app/oracle/product/11.2.0/db_1/bin/oracle

-r-sr-s--x 1 oracle oinstall 173515905 Apr 17 15:07 /u01/app/oracle/product/11.2.0/db_1/bin/oracle

发现文件的所属的group错误，Oracle 后台进程启动时会执行此文件，而如果属于oinstall组，则无权访问ASM磁盘驱动，从而无法访问ASM disk。

正常属性应该是：

[oracle@node1 ~]$ ls -l /u01/app/oracle/product/11.2.0/db_1/bin/oracle

-r-sr-s--x 1 oracle asmadmin 173515905 Dec 28 18:17 /u01/app/oracle/product/11.2.0/db_1/bin/oracle

修改属性：

[root@node3 ~]# chown oracle:asmadmin /u01/app/oracle/product/11.2.0/db_1/bin/oracle

[root@node3 asm]# ls -l /u01/app/oracle/product/11.2.0/db_1/bin/oracle

-r-xr-x--x 1 oracle asmadmin 173515905 Apr 17 15:07 /u01/app/oracle/product/11.2.0/db_1/bin/oracle

[root@node3 asm]# chmod 6551 /u01/app/oracle/product/11.2.0/db_1/bin/oracle

[root@node3 asm]# ls -l /u01/app/oracle/product/11.2.0/db_1/bin/oracle

-r-sr-s--x 1 oracle asmadmin 173515905 Apr 17 15:07 /u01/app/oracle/product/11.2.0/db_1/bin/oracle

@更改完成后，再启动Instance ，Instance 启动正常！

本文转自客居天涯 51CTO博客，原文链接：http://blog.51cto.com/tiany/1397355，如需转载请自行联系原作者

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