linux RAC asm_diskgroup未设置引起数据库实例无法打开
重新启动linux 机器后 发现数据库实例启动不了。
instance 都没有启动
[oracle@rac2 crsd]$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora.prod.db application ONLINE OFFLINE
ora....d1.inst application ONLINE OFFLINE
ora....d2.inst application ONLINE OFFLINE
ora....SM1.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....SM2.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
rac1 节点：
[oracle@rac1 crs]$ export ORACLE_SID=prod1
[oracle@rac1 crs]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Oct 25 04:01:29 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORA-01078: failure in processing system parameters
ORA-01565: error in identifying file '+DATA/prod/spfileprod.ora'
ORA-17503: ksfdopn:2 Failed to open file +DATA/prod/spfileprod.ora
ORA-15077: could not locate ASM instance serving a required diskgroup
SQL>
初步判断是ASM实例问题，无法访问spfile文件
[oracle@rac1 crs]$ export ORACLE_SID=+ASM1
[oracle@rac1 crs]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Oct 25 04:03:15 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
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$asm_diskgroup;
NAME STATE
------------------------------ ----------- -------磁盘组未挂载
REC DISMOUNTED
DATA DISMOUNTED
SQL> alter diskgroup rec mount;
Diskgroup altered.
SQL> alter diskgroup data mount;
Diskgroup altered.
SQL>
[oracle@rac1 crs]$ export ORACLE_SID=prod1
[oracle@rac1 crs]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Oct 25 04:05:22 2013
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218968 bytes
Variable Size 100664936 bytes
Database Buffers 176160768 bytes
Redo Buffers 7168000 bytes
Database mounted.
Database opened.
SQL> -------实例1打开
[oracle@rac1 crs]$ crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora.prod.db application ONLINE ONLINE rac2
ora....d1.inst application ONLINE ONLINE rac1
ora....d2.inst application ONLINE OFFLINE
ora....SM1.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....SM2.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
-------以同样方法打开实例2（略）
------为什么磁盘组不能自动正常挂载呢？
查看+ASM的pfile
###########################################
# Cluster Database
###########################################
cluster_database=true
###########################################
# Diagnostics and Statistics
###########################################
background_dump_dest=/u01/app/oracle/admin/+ASM/bdump
core_dump_dest=/u01/app/oracle/admin/+ASM/cdump
user_dump_dest=/u01/app/oracle/admin/+ASM/udump
###########################################
# Miscellaneous
###########################################
instance_type=asm
###########################################
# Pools
###########################################
large_pool_size=12M
###########################################
# Security and Auditing
###########################################
remote_login_passwordfile=exclusive
asm_diskgroups=''
+ASM2.instance_number=2
+ASM1.instance_number=1
asm_diskgroups的解释：
将参数文件中的 asm_diskgroup 参数改为：asm_diskgroup=rec，data
测试：
SQL> select name,state from V$asm_diskgroup;
NAME STATE
------------------------------ -----------
REC DISMOUNTED
DATA DISMOUNTED
SQL> shutdown immediate;
ORA-15100: invalid or missing diskgroup name
ASM instance shutdown
SQL> startup
ASM instance started
Total System Global Area 92274688 bytes
Fixed Size 1217884 bytes
Variable Size 65890980 bytes
ASM Cache 25165824 bytes
ASM diskgroups mounted
SQL> select name,state from V$asm_diskgroup;
NAME STATE
------------------------------ -----------
DATA MOUNTED
REC MOUNTED
SQL>