ORA-00205: error in identifying control file, check alert log for more info

ORA-00205: error in identifying control file, check alert log for more info.

When startup the databse getting error like ORA-00205

[oracle@db_ ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.1.0 Production on Thu Dec 27 21:18:15 2018

Copyright (c) 1982, 2009, Oracle.  All rights reserved.

Connected to an idle instance.

SYS@adjstage>startup
ORACLE instance started.

Total System Global Area 1068937216 bytes
Fixed Size     2220200 bytes
Variable Size   855641944 bytes
Database Buffers   201326592 bytes
Redo Buffers     9748480 bytes
ORA-00205: error in identifying control file, check alert log for more info

Solution :- 

Check the control file location.

SYS@adjstage>show parameter control_files

NAME      TYPE VALUE

------------------------------------ ----------- ------------------------------

control_files      string /u01/datafile/adjstage_datafil

es/ADJSTAGE/controlfile/o1_mf_

7knp4dys_.ctl

Ensure control file exists in the respective locations.

Also check the permission for the file.

[root@db_ controlfile]# ll u01/datafile/adjstage_datafiles/ADJSTAGE/controlfile/o1_mf_7knp4dys_.ctl

-rw-r----- 1 oracle oinstall 14237696 Dec 27 22:38 o1_mf_7knp4dys_.ctl

[root@db_ controlfile]# 

permission should be oracle:oinstall.

After checking the permission shutdown and startup the database.

Shutdown the database and start it up:

SYS@adjstage> shut immediate;

ORA-01507: database not mounted

ORACLE instance shut down.

SYS@adjstage>startup

ORACLE instance started.

Total System Global Area 1068937216 bytes

Fixed Size     2220200 bytes

Variable Size   855641944 bytes

Database Buffers   201326592 bytes

Redo Buffers     9748480 bytes

Database mounted.

Database opened.

SYS@adjstage>select name,open_mode from v$database;  

NAME   OPEN_MODE

--------- --------------------

ADJSTAGE  READ WRITE