ORA-15274:: When doing voting disk replace with less failgroup

(Doc ID 1574001.1)

Last updated on AUGUST 05, 2013

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.1 and later
Information in this document applies to any platform.

Symptoms

 There was ocr /voting diskgroup of normal redundancy with 3 failgroups  .

Then tried to do replace to another asm diskgroup with normal redundancy on 12C .

From ASM alertlog,

 

NOTE: Disk DATA_0000 in mode 0x0 marked for de-assignment
SUCCESS: refreshed membership for 4/0xc5686b29 (DATA)
Wed Jul 31 10:44:28 2013
NOTE: Creating voting files in diskgroup DATA
Wed Jul 31 10:44:28 2013
NOTE: Voting File refresh pending for group 4/0xc5686b29 (DATA)
Wed Jul 31 10:44:28 2013
NOTE: Attempting voting file creation in diskgroup DATA
NOTE: voting file allocation (replicated) on grp 4 disk DATA_0001
NOTE: voting file allocation on grp 4 disk DATA_0001
NOTE: voting file allocation (replicated) on grp 4 disk DATA_0002
NOTE: voting file allocation on grp 4 disk DATA_0002
ERROR: Voting file allocation failed for group DATA
Wed Jul 31 10:44:30 2013
Errors in file /u01/app/oracle/diag/asm/+asm/+ASM1/trace/+ASM1_ora_11980.trc:
ORA-15274: Not enough failgroups (3) to create voting files <<<<<<<<<<<<<<<<<<<<<<<<<<<<
Wed Jul 31 10:44:31 2013
NOTE: stopping process ARB0

 

From the trace file in ASM,

Updating headers of disk /dev/sdb2 with 288 320
PST-new:0x7f1fe658fd90:0x9e5b5820:45:
/dev/sdb2:ec4fa13e695f4fbbbfea847d66117287:
2013-07-31 10:44:30.410: [ CSSCLNT]clsssVoteDiskFormat: call clsscfgfmtbegin with leasedata (nil), size 0
2013-07-31 10:44:30.410: [ CSSCLNT]clsssVoteDiskFormat: succ-ly format the Voting Disk
2013-07-31 10:44:30.411: [ CSSCLNT]clsssVoteDiskFormat: call clsscfgfmtbegin with leasedata (nil), size 0
2013-07-31 10:44:30.411: [ CSSCLNT]clsssVoteDiskFormat: succ-ly format the Voting Disk
Updating headers of disk /dev/sdb3 with 224 192
Updating headers of disk /dev/sdb3 with 192 224
PST-new:0x7f1fe658fdf8:0x9e5b5be8:45:
/dev/sdb3:7079382e82dc4fd3bf19a923f8050860:
ORA-15274: Not enough failgroups (3) to create voting files

 

It failed saying as ORA-15274: Not enough failgroups (3) to create voting files.

But on 11.2.0.3 ,when we did same test ,even replace completed successfully to external redundancy diskgroup.

Cause

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