APPLIES TO:

OracleDatabase - Enterprise Edition - Version 11.2.0.1 to 12.1.0.1 [Release 11.2 to12.1]

Informationin this document applies to any platform.

***Checked for relevance on 03-Jul-2013*** 

SYMPTOMS

If OCR is located on ASM diskgroup, following shows inASM alert log ($ORACLE_BASE/diag/asm/+asm/+ASMn/trace/alert_+ASMn.log) after ASM mounted all diskgroup successfully whilestarting up Grid Infrastructure(CRS):

SQL>ALTER DISKGROUP ALL MOUNT /* asm agent */

..

SUCCESS:diskgroup GI was mounted

SUCCESS:ALTER DISKGROUP ALL MOUNT /* asm agent */

..

WARNING:failed to online diskgroup resource ora.GI.dg (unable to communicate withCRSD/OHASD)

Or after ASM dismounted all diskgroup successfullywhile shutting down clusterware:

..

SUCCESS:ALTER DISKGROUP ALL DISMOUNT /* asm agent */

Sun Feb07 11:11:13 2010

WARNING:failed to offline diskgroup resource ora.GI.dg (unable to communicate withCRSD/OHASD)

..

freeingrdom 0

CAUSE

In contrast to previous version of CRS, 11gR2 ASM doesnot depend on CRSD anymore; rather if OCR is located on ASM, ASM will startbefore CRSD while clusterware is coming up, and stops after CRSD whileclusterware is going down. Due to the new startup sequence, ASM can not updatediskgroup resource status in CRSD either during clusterware startup orshutdown, thus above message is logged.

SOLUTION

The message can be ignored, the status of diskgroupand diskgroup resource will be synchronize by oraagent once clusterware isfully up.

To find out diskgroup resource status:

$GRID_HOME/bin/srvctl status diskgroup -gdiskgroupname -a

To start or sync diskgroup resource:

$GRID_HOME/bin/srvctl start diskgroup -g diskgroupname

ALERT.LOG for ASM Shows "WARNING: failed to online diskgroup resource ora.GI.dg (unable to communica