Creating Single Database Instance in Exadata Setup having RAC databases with same name ,fails with ORA-00304

Creating Single Database Instance in Exadata Setup having RAC databases with same name ,fails with ORA-00304 (Doc ID 1455218.1)

Last updated on JULY 21, 2017

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.2 and later
Information in this document applies to any platform.
***Checked for relevance on 21-Jul-2017***

Symptoms

Unable to create a single instance "DUPDB" with a database name "UTLD" on a Exadata Server, when there are already exists a two node RAC database having Database Name "UTLD" on the Exadata servers.

Exadata box with four servers: DB01, DB02, DB03 and DB04.
A two node RAC database "UTLD" exists on DB01 and DB02.
When attempting to create a single instance "DUPDB" with a database name of "UTLD" on DB03; it fails with:

$ echo $ORACLE_SID
dupdb

SQL> STARTUP NOMOUNT PFILE='/u02/oradba/initdupdb.ora'
ORA-00304: requested INSTANCE_NUMBER is busy

Pfile(initdupdb.ora) has:

instance_name='dupdb'

db_name='utld'

Cause

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Symptoms

Cause

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