ORA-15024: Discovered Duplicately Numbered ASM Disk

(Doc ID 1457185.1)

Last updated on MARCH 22, 2018

Applies to:

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

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


On : 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


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


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