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ORA-015039, ORA-15063: ASM Discovered An Insufficient Number Of Disks For Diskgroup (Doc ID 1478128.1)

Last updated on JANUARY 30, 2022

Applies to:

Oracle Database - Enterprise Edition - Version and later
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.


1). Receiving an error when trying to remove an old Diskgroup that is no longer being used:

ASMCMD> dropdg  -r -f data1
ORA-15039: diskgroup not dropped
ORA-15063: ASM discovered an insufficient number of disks for diskgroup "DATA1" (DBD ERROR: OCIStmtExecute)


2). Current +ASM configuration shows diskgroup as not being present and is confirmed by querying the v$asm_disk and v$asm_diskgroup views.

3). ASM alert log shows the following being issued by CRS agent:

Wed Jun 27 13:53:38 2012
SQL> ALTER DISKGROUP DATA1 MOUNT  /* asm agent *//* {0:0:919} */
NOTE: cache registered group DATA1 number=1 incarn=0xe554adc9
NOTE: cache began mount (first) of group DATA1 number=1 incarn=0xe554adc9


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