文章转自MOS:
Startup Instance Failed with ORA-27140 ORA-27300 ORA-27301 ORA-27302 and ORA-27303 on skgpwinit6 (文档 ID 1274030.1)

APPLIES TO:

Oracle Database - Standard Edition - Version 11.2.0.1 and later
Information in this document applies to any platform.
***Checked for relevance on 29-Mar-2013***

SYMPTOMS

On : 11.2.0.1 version, Real Application Cluster

When attempting to start database as oracle user, the following errors are seen in alert log.

ERROR
-----------------------

	ORA-00210: cannot open control file

ORA-00202: error in writing''+RECODG/utsdb/controlfile/current.256.732754521''

ORA-17503: ksfdopn: 2 Failed to open file +RECODG/utsdb/controlfile/current.256.732754521

ORA-15001: diskgroup "RECODG" does not exist or is not mounted

ORA-15055: unable to connect to ASM instance

ORA-27140: attach to post/wait facility failed

ORA-27300: OS system dependent operation:invalid_euid failed with status: 1

ORA-27301: OS failure message: Not owner

ORA-27302: failure occurred at: skgpwinit5

ORA-27303: additional information: startup euid = 100 (grid), current euid = 101 (oracle)

STEPS
-----------------------
The issue can be reproduced at will with the following steps:

	$ sqlplus "/as sysdba"

SQL> startup

Or in some cases, DBCA fails to create database with :

	ORA-19503:failed to create file +OLTP

ORA-15001: disk group does not exist or is not mounted

ORA-15055: Unable to connect to ASM instance

ORA-27140:attach to post/wait facility failed

ORA-27300: OS system dependent operation: invalid_egid failed with status 1

ORA-27301: OS failure message:operation not permitted

ORA-27302: failure occured at: skgpwinit6

ORA-27303: additional information: startup egid = 501(oinstal),current egid=502(dba)

CAUSE

The issue is caused by wrong permission of the GI_HOME/bin/oracle executable.

In one case, customer changed the file permission of GI_HOME/bin/oracle from "-rwsr-s--x" to "-rwxrwxr-x".
The correct permission should be "-rwsr-s--x".

SOLUTION

1. Stop the CRS.
2. Change the file permission of GI_HOME/bin/oracle to "-rwsr-s--x":

	$su - grid

$cd GI_HOME/bin

$chmod 6751 oracle

$ls -l oracle

3.Start the /CRS.

4.Test if you can startup the rdbms database using oracle user.

5. For issue in DBCA, Re-run DBCA.