ORA-15024: discovered duplicately numbered ASM disk (Doc ID 1457185.1)

Last updated on OCTOBER 31, 2016

Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 and later
Information in this document applies to any platform.


***Checked for relevance on 21-Jan-2014***

Symptoms

On : 10.2.0.4 version, STORAGE

ASM failed to start

after server reboot, the disk group can not mount,If you try to mount it you may get below error

 SQL> alter diskgroup DATA MOUNT;
alter diskgroup DATA MOUNT
*
ERROR at line 1:
ORA-15032: not all alterations performed
ORA-15024: discovered duplicately numbered ASM disk 4

Changes

 There could have been duplication of Major/Minor number at the os level.

Cause

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