ASMCA Gets Ora-15020 when using non-default disk paths (Doc ID 1086140.1)

Last updated on JULY 05, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.1.0 and later
Information in this document applies to any platform.
***Checked for relevance on 19-May-2013***

Symptoms

ASMCA is not able to use disk paths other than /dev/raw/* when configuring ASM and create diskgroups at initial setup for single instance environment.
RAC environment did not have this issue.

Also, diskgroup creation with any disk paths works at the command line once the ASM instance is configured.

ASMCA would fail with ORA-15020 errors while there was no duplicate disk path found.

Sample errors in ASMCA log are

oracle.sysman.assistants.usmca.backend.USMDiskGroupManager:createDiskGroups
[main] [ 2010-03-29 10:44:27.953 CDT ] [UsmcaLogger.logException:172]
ORA-15018: diskgroup cannot be created
ORA-15020: discovered duplicate ASM disk "OCRVDG_0000"



Cause

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