Oracle Boot-time ORA-00600 error handling method __oracle

Oracle startup times wrong ORA-00600: Internal error code, parameters: [Kcratr1_lostwrt], [], [], [], [], [], [], []

This may be due to illegal shutdown or power off, following are the problems and solutions:

C:/Documents and Settings/administrator>sqlplus
Please enter user name:/as sysdba
Sql> Startup
ORA-01081: Unable to start an ORACLE---that is already running please close first
sql> Shutdown Abort
The ORACLE routine has been closed.
Sql> Startup
The ORACLE routine has started.

Total System Global area  135338868 bytes
Fixed size                    453492 bytes
Variable size              109051904 bytes
Database buffers            25165824 bytes
Redo buffers                  667648 bytes
Database mount complete.
ORA-00600: Internal error code, parameters: [Kcratr1_lostwrt], [], [], [], [], [], [], []

Sql> shutdown Immediate
ORA-01109: The database is not open
has uninstalled the database. The
ORACLE routine is closed. The
sql> startup Mount
ORACLE routine has started.
Total System Global area  135338868 bytes
Fixed size                    453492 bytes
Variable size              109051904 bytes
Database buffers            25165824 bytes
Redo buffers                  667648 bytes
Database mount complete.
sql> recover database; The
completes media recovery.
Sql> ALTER DATABASE open; The
database has changed.
Sql>exit;