Hi ,
Here are few lines from my alert.log...any idea from this...
Plz help me out...

Database mounted in Exclusive Mode.
Completed: alter database mount
Sun Oct 10 20:54:17 1999
alter database open
Beginning crash recovery of 1 threads
Sun Oct 10 20:54:18 1999
Thread recovery: start rolling forward thread 1
Recovery of Online Redo Log: Thread 1 Group 3 Seq 14577 Reading mem 0
Mem# 0 errs 0: /data/oracle/dbfiles/oradata/SCB/redo01.log
Sun Oct 10 20:54:18 1999
Thread recovery: finish rolling forward thread 1
Thread recovery: 3 data blocks read, 3 data blocks written, 39 redo blocks read
Crash recovery completed successfully
Sun Oct 10 20:54:18 1999
Thread 1 advanced to log sequence 14578
Thread 1 opened at log sequence 14578
Current log# 1 seq# 14578 mem# 0: /data/oracle/dbfiles/oradata/SCB/redo03.log
Successful open of redo thread 1.
Sun Oct 10 20:54:18 1999
SMON: enabling cache recovery
SMON: enabling tx recovery
Sun Oct 10 20:54:18 1999
Errors in file /data/oracle/admin/SCB/bdump/scb_smon_903.trc:
ORA-00600: internal error code, arguments: [kcbrbr_2], [3], [16878170], [8], [], [], [], []
SMON: terminating instance due to error 600
Instance terminated by SMON, pid = 903

Thanks
Sandy