磁碟組不能自動掛載的原因有2：

1 、asm_diskgroups 不能為空，需要配置所有的磁碟組
2、磁碟組的屬性AUTO_START應該設定為always，該問題是bug  8663101 ：修改用 crsctl modify resource ora.DATA.dg -attr AUTO_START=always，查詢用：crsctl stat res ora.OCR.dg -p

[grid@node1 ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Sat Feb 25 06:32:37 2017

Copyright (c) 1982, 2009, Oracle. All rights reserved.

Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options

SQL> show parameter disk

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
asm_diskgroups string ARCH, TEST, DATA, OCR
asm_diskstring string /dev/asm*, ORCL:ARCHDISK, ORCL
:DATADISK, ORCL:OVDISK
SQL> create pfile='/tmp/a.txt' from spfile;

File created.

SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Real Application Clusters and Automatic Storage Management options
[grid@node1 ~]$ more /tmp/a.txt
+ASM2.__oracle_base='/u01/app'#ORACLE_BASE set from in memory value
+ASM1.__oracle_base='/u01/app/'#ORACLE_BASE set from in memory value
+ASM1.asm_diskgroups='ARCH','TEST','DATA','OCR'#Manual Mount
+ASM2.asm_diskgroups='ARCH','DATA','TEST','OCR'#Manual Mount
*.asm_diskstring='/dev/asm*','ORCL:ARCHDISK','ORCL:DATADISK','ORCL:OVDISK'
*.asm_power_limit=1
*.diagnostic_dest='/u01/app'
*.instance_type='asm'
*.large_pool_size=12M
*.remote_login_passwordfile='EXCLUSIVE'
[grid@node1 ~]$

[root@rac1 ~]# srvctl start diskgroup -g data -n "rac2"
[root@rac1 ~]# srvctl start diskgroup -g oradata -n "rac2"
[root@rac1 ~]# srvctl start diskgroup -g oradata -n "rac1"
[root@rac1 ~]# su - grid
[grid@rac1:/home/grid]$crsctl modify resource ora.DATA.dg -attr AUTO_START=always
[grid@rac1:/home/grid]$crsctl modify resource ora.ORADATA.dg -attr AUTO_START=always
[grid@rac1:/home/grid]$crsctl modify resource ora.ARCH.dg -attr AUTO_START=always
[grid@rac1:/home/grid]$crsctl modify resource ora.OCR.dg -attr AUTO_START=always

多次測試  所有磁碟均能正常掛載

該解決辦法出自 ID:1065158.1  問題原因可能涉及到11.2.0.1的一個BUG  bug 8663101 該BUG 在12.2.0.2已經被修復

下一步該升級資料庫了

1. Manually start the diskgroup: srvctl start diskgroup -g <dg_name> [-n "<node_list>"]
or
2. Modify the attribute AUTO_START to "always"

crsctl modify resource ora.<diskgroup>.dg -attr AUTO_START=always

Diskgroup resource shows status offline after restart even it is mounted in ASM instance (文件 ID 1065158.1)

轉到底部

In this Document

Symptoms

Changes

Cause

Solution

References

APPLIES TO:

Oracle Database - Enterprise Edition - Version 11.2.0.1.0 and later
Information in this document applies to any platform.

SYMPTOMS

After restart the 11.2 HAS stack, the diskgroup (.dg) resource is showing "OFFLINE" status, but diskgroup is mounted in the ASM instance.

For example:

$ crsctl stat res ora.DATA.dg

NAME=ora.DATA.dg
TYPE=ora.diskgroup.type
TARGET=OFFLINE, ONLINE
STATE=OFFLINE, ONLINE on host1

From ASM when you query , the diskgroup shows as mounted.

SQL> conn / as sysdba
Connected.
SQL> select name,state from v$asm_diskgroup;

NAME STATE
------------------------------ -----------
DATA MOUNTED

CHANGES

From the crsd.log:

2010-02-05 16:05:09.988: [ A**][56] ora.DATA.dg host1 1 received state from probe request. Old state = UNKNOWN, New state = OFFLINE

From oraagent_oracle.log:

2010-02-05 16:05:09.799: [ A**][9] ora.DATA.dg host1 1 state changed from: UNKNOWN to: OFFLINE

CAUSE

This is caused by an unpublished bug 8663101 11.2 DG RES OFFLINE, BUT DISKGROUP MOUNTED AFTER RESTART HAS STACK

The diskgroup is mounted in asm before crsd is up so crsd is never notified of the diskgroup resource start.

SOLUTION

The bug has been fixed in 11.2.0.2 patchset.

Two workarounds available:

1. Manually start the diskgroup:
srvctl start diskgroup -g <dg_name> [-n "<node_list>"]

or
2. Modify the attribute AUTO_START to "always"
crsctl modify resource ora.<diskgroup>.dg -attr AUTO_START=always

REFERENCES

NOTE:1060920.1 - ALERT.LOG for ASM Shows "WARNING: failed to online diskgroup resource ora.GI.dg (unable to communicate with CRSD/OHASD)"

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