Exadata: GridDisk Cannot be added to Diskgroup Due to "ORA-15020: discovered duplicate ASM disk" Error (Doc ID 2293693.1)

Last updated on AUGUST 03, 2017

Applies to:

Oracle Exadata Storage Server Software - Version 11.2.1.2.0 to 12.1.2.2.3 [Release 11.2 to 12.1]
Oracle Database - Enterprise Edition - Version 11.2.0.1 to 12.2.0.1 [Release 11.2 to 12.2]
Information in this document applies to any platform.

Symptoms

1) Griddisks cannot be added back to diskgroups after replacing associated physical disk in cell server.

 

2) The 3 griddisks associated to the replaced physical disks show asmmodestatus = ONLINE:

     

Cause

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