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

SQL>  conn / as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.

Total System Global Area  839282688 bytes
Fixed Size                  2217992 bytes
Variable Size             494929912 bytes
Database Buffers          339738624 bytes
Redo Buffers                2396160 bytes
ORA-00205: error in identifying control file, check alert log for more info

Eger sizde benim gibi yukaridaki hatayi aldiysaniz. sorun ORACLE_SID `nin ASM olmamasidir.

Çözüm; Oracle SID'sini ASM'ye çevirmek..

sqlplus / as sysdba
SQL>shutdown immediate;
exit
2.export ORACLE_SID=+ASM

SQL> startup

yada

SQL> startup force

ORACLE instance started.

Total System Global Area  839282688 bytes

Fixed Size                  2217992 bytes

Variable Size             494929912 bytes

Database Buffers          339738624 bytes

Redo Buffers                2396160 bytes

Database mounted.

Database opened.

SQL> select open_mode from v$database;

OPEN_MODE

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

READ WRITE

SQL>