ORA-600 kcratr1_lastbwr
I hit the error below during startup of my 10.2.0.4 installation running on Solaris 64 on
ORA-00600: internal error code, arguments: [kcratr1_lastbwr], [], [], [], [],[], [], []
Basically none of the instances start-up with srvctl command and log this error to alert log.
Tried to run manual startup of instances but no chance same error.
Quick search on MOS (yes it was working 
) take me to the note 393984.1 (no bug number)
It says this is a bug on Enterprise Edition – Version: 10.2.0.1 to 11.1.0.6.0
Solution is manual recovery.
SQL> startup;
ORACLE instance started.
Total System Global Area 369098752 bytes
Fixed Size 2020864 bytes
Variable Size 138414592 bytes
Database Buffers 226492416 bytes
Redo Buffers 2170880 bytes
Database mounted.
ORA-00600: internal error code, arguments: [kcratr1_lastbwr], [], [], [], [],
[], [], []
SQL> recover database;
Media recovery complete.
SQL> alter database open;
Database altered.