解决RAC 实例不能启动

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一. 发现问题

准备启动RAC 做升级的实验，启动后，实例无法启动， crs_stat 显示ASM 实例已经启动了。

[oracle@rac1 bin]$ crs_stat -t

Name Type Target State Host

------------------------------------------------------------

ora.orcl.db application ONLINE OFFLINE

ora....oltp.cs application ONLINE OFFLINE

ora....cl1.srv application ONLINE OFFLINE

ora....cl2.srv application ONLINE OFFLINE

ora....l1.inst application ONLINE OFFLINE

ora....l2.inst application ONLINE OFFLINE

ora....SM2.asm application ONLINE ONLINE rac1

ora....C1.lsnr application ONLINE ONLINE rac1

ora.rac1.gsd application ONLINE ONLINE rac1

ora.rac1.ons application ONLINE ONLINE rac1

ora.rac1.vip application ONLINE ONLINE rac1

ora....SM1.asm application ONLINE ONLINE rac2

ora....C2.lsnr application ONLINE ONLINE rac2

ora.rac2.gsd application ONLINE ONLINE rac2

ora.rac2.ons application ONLINE ONLINE rac2

ora.rac2.vip application ONLINE ONLINE rac2

二. 定位问题

2.1 看了相关日志，没有发现什么有用的信息。

crs日志：

[oracle@rac1 ~]$ tail -f /u01/app/oracle/product/10.2.0/crs_1/log/rac1/alertrac1.log

[oracle@rac2 ~]$ tail -f /u01/app/oracle/product/10.2.0/crs_1/log/rac2/alertrac2.log

ASM日志：

[oracle@rac1 ~]$ tail -f /u01/app/oracle/admin/+ASM/bdump/alert_+ASM1.log

[oracle@rac2 ~]$ tail -f /u01/app/oracle/admin/+ASM/bdump/alert_+ASM2.log

数据库日志：

[oracle@rac1 ~]$ tail -f /u01/app/oracle/admin/ora9i/bdump/alert_rac1.log

[oracle@rac2 ~]$ tail -f /u01/app/oracle/admin/ora9i/bdump/alert_rac2.log

2.2 检查ASM实例磁盘状态

连上ASM实例后，查看磁盘组状态，为DISMOUNTED, 应该就是这个原因导致实例无法启动了。手动启动磁盘组后，在用crs_start 命令启动相关进程。

这里要注意的地方，每个节点都需要连上去，手动的mount磁盘组。

[oracle@rac2 racg]$ export ORACLE_SID=+ASM2

[oracle@rac2 racg]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Wed Sep 15 03:53:18 2010

Connected to:

Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production

With the Partitioning, Real Application Clusters, OLAP and Data Mining options

SQL> select name,state from v$asm_diskgroup;

NAME STATE

------------------------------ -----------

DATA DISMOUNTED

FLASH_RECOVERY_AREA DISMOUNTED

SQL> alter diskgroup DATA mount;

Diskgroup altered.

SQL> alter diskgroup FLASH_RECOVERY_AREA mount;

Diskgroup altered.

SQL> select name,state from v$asm_diskgroup;

NAME STATE

------------------------------ -----------

DATA MOUNTED

FLASH_RECOVERY_AREA MOUNTED

SQL>

Oracle ASM 详解

http://blog.csdn.net/tianlesoftware/archive/2010/02/22/5314541.aspx

三. 问题解决

用crs_start 命令启动进程后，所有进程都online了。可以继续做RAC的升级实验了。

[oracle@rac1 bin]$ crs_stat -t

Name Type Target State Host

------------------------------------------------------------

ora.orcl.db application ONLINE ONLINE rac2

ora....oltp.cs application ONLINE ONLINE rac1

ora....cl1.srv application ONLINE ONLINE rac2

ora....cl2.srv application ONLINE ONLINE rac1

ora....l1.inst application ONLINE ONLINE rac2

ora....l2.inst application ONLINE ONLINE rac1