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This article is about how to solve the problem that Oracle12c single-instance environment cannot create asm disk groups. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

The Oracle12c single instance database is installed and configured through asm, and Oracle Grid Infrastructure is not configured properly. Oracle Grid Infrastructure is not configured properly appears when asmca creates the asm disk. ASMCA needs Oracle Grid Infrastructure to configure ASM promotion information, as shown in the screenshot below:

From the problems above, we can clearly see that the ASMCA cannot be created because it cannot connect to the OracleGrid Infrastructure. Check the has process to make sure it is up, where my environment has is not up, re-execute

/ u01/app/12.1.0/grid/crs/install/roothas.pl, as follows:

[root@localhost ~] # / u01/app/12.1.0/grid/crs/install/roothas.pl

Using configuration parameter file: / u01/app/12.1.0/grid/crs/install/crsconfig_params

LOCAL ADD MODE

Creating OCR keys for user 'oracle', privgrp' oinstall'..

Operation successful.

LOCAL ONLY MODE

Successfully accumulated necessary OCR keys.

Creating OCR keys for user 'root', privgrp' root'..

Operation successful.

CRS-4664: Node localhost successfully pinned.

11:06:47 on 2017-07-10 CLSRSC-330: Adding Clusterware entries to file 'oracle-ohasd.conf'

Localhost 2017-07-10 11:07:05 / u01/app/12.1.0/grid/cdata/localhost/backup_20170710_110705.olr 0

CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'localhost'

CRS-2673: Attempting to stop 'ora.evmd' on' localhost'

CRS-2677: Stop of 'ora.evmd' on' localhost' succeeded

CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'localhost' has completed

CRS-4133: Oracle High Availability Services has been stopped.

CRS-4123: Oracle High Availability Services has been started.

2017-07-10 11:08:18 CLSRSC-327: Successfully configured Oracle Restart for a standalone server

Once again, create an asm disk group through asmca, which can be created successfully, as shown in the following figure.

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