ora-15077，ASM磁盤組不能掛載2009-09-29 18:51　　一、現象分析：

1、數據庫和實例服務無法啟動，如下：

[oracle@rac1 ~]$ crs_stat -t

Name? ?? ?? ???Type? ?? ?? ???Target? ? State? ???Host

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

ora.....CRM.cs application? ? ONLINE? ? OFFLINE? ?rac1

ora....cl1.srv application? ? ONLINE? ? OFFLINE? ?rac1

ora.orcl.db? ? application? ? ONLINE? ? OFFLINE? ?rac2

ora....l1.inst application? ? ONLINE? ? OFFLINE? ?rac1

ora....l2.inst application? ? ONLINE? ? OFFLINE? ?rac2

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

2、單獨啟動某個應用服務依然啟不起來

3、用sqlplus啟動實例，如下：

[oracle@rac1]$ export ORACLE_SID=devdb1

SQL> startup;

ORA-01078: failure in processing system parameters

ORA-01565: error in identifying file '+DG1/devdb/spfiledevdb.ora'

ORA-17503: ksfdopn:2 Failed to open file +DG1/devdb/spfiledevdb.ora

ORA-15077: could not locate ASM instance serving a required diskgroup

可以看出diskgroup沒有mount,所以先把diskgroup mount

也可做下面的測試，同樣也會報磁盤組沒掛載：

[oracle@rac1 bdump]$ export ORACLE_SID=+ASM1

[oracle@rac1 bdump]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Sat Mar 22 17:59:39 2008

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> 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

ORA-15110: no diskgroups mounted

二、解決辦法：

1、首先掛載ASM磁盤組

[oracle@rac1 bdump]$ export ORACLE_SID=+ASM1

[oracle@rac1 bdump]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Sat Mar 22 17:59:39 2008

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

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

RECOVERYDEST? ?? ?? ?? ?? ?? ? DISMOUNTED

DG1? ?? ?? ?? ?? ?? ?? ?? ?? ? DISMOUNTED

SQL> alter diskgroup RECOVERYDEST mount;

Diskgroup altered.

SQL> alter diskgroup DG1 mount;

Diskgroup altered.

SQL> exit

Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production

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

2、啟動數據庫實例

[oracle@rac1 bdump]$ export ORACLE_SID=devdb1

[oracle@rac1 bdump]$ sqlplus / as sysdba

SQL> startup;

ORACLE instance started.

Total System Global Area 264241152 bytes

Fixed Size? ?? ?? ?? ?? ?? ?1218868 bytes

Variable Size? ?? ?? ?? ? 109053644 bytes

Database Buffers? ?? ?? ? 150994944 bytes

Redo Buffers? ?? ?? ?? ?? ? 2973696 bytes

Database mounted.

database open.

三、原因：

發現可能是因為oracle用戶下的.bashrc文件中$ORACLE_SID環境變量與實際建庫的數據庫名不一致所至,所以在數據庫啟動時會找不到環境變量對應的實例名

.bashrc中是orcl1

[oracle@rac1~]cat .bashrc

.....

export ORACLE_SID=orcl1

.....

而實現的實例名是devdb1

所以修改.bashrc中的ORACLE_SID=devdb1

SQL> startup

ORA-01078: failure in processing system parameters

ORA-01565: error in identifying file '+RAC_DISK/RACDB/spfileRACDB.ora'

ORA-17503: ksfdopn:2 Failed to open file +RAC_DISK/RACDB/spfileRACDB.ora

ORA-15077: could not locate ASM instance serving a required diskgroup

--檢查ASM實例運行情況

[oracle@node1 ~]$ srvctl status asm -n node1

ASM instance +ASM1 is running on node node1.

[oracle@node1 ~]$ srvctl status asm -n node2

ASM instance +ASM2 is not running on node node2.

[oracle@node1 ~]$

能看出,在節點2(也就是出問題的節點)上ASM實例并沒有啟動 ,明顯是asm實列沒有startup.數據庫的spfile又放在asm區，由于asm實列沒有起來，導致數據庫找不到磁盤組。

[oracle@node2 dbs]$ export ORACLE_SID=+ASM2

[oracle@node2 dbs]$ sqlplus / as sysdba

SQL*Plus: Release 10.2.0.1.0 - Production on Tue Mar 17 08:57:56 2009

Copyright (c) 1982, 2005, Oracle.??All rights reserved.

Connected to an idle instance.

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

[oracle@node2 dbs]$ export ORACLE_SID=RACDB2

SQL> startup

ORACLE instance started.

Total System Global Area??184549376 bytes

Fixed Size? ?? ?? ?? ?? ?? ?1218412 bytes

Variable Size? ?? ?? ?? ???96471188 bytes

Database Buffers? ?? ?? ???83886080 bytes

Redo Buffers? ?? ?? ?? ?? ? 2973696 bytes

Database mounted.

Database opened.

SQL>

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