istributed_transactions = 10
instance_name = des85
service_names = des85
sort_area_size = 65536
sort_area_retained_size = 65536
db_name = des85
open_cursors = 400
ifile = C:\oracle\admin\des85\pfile\initdes85.ora
os_authent_prefix =
optimizer_mode = RULE
job_queue_processes = 1
job_queue_interval = 60
parallel_max_servers = 5
background_dump_dest = C:\oracle\admin\des85\bdump
user_dump_dest = C:\oracle\admin\des85\udump
max_dump_file_size = 10240
oracle_trace_collection_name=
PMON started with pid=2
DBW0 started with pid=4
RECO started with pid=8
My trace log file

LGWR started with pid=5
SNP0 started with pid=3
CKPT started with pid=6
SMON started with pid=7
Thu Oct 24 12:46:35 2002
alter database mount exclusive
***
Corrupt block relative dba: 0x00000003 (file 0, block 3)
Fractured block found during controlfile block read
Data in bad block -
type: 21 format: 2 rdba: 0x00000003
last change scn: 0xefff.0000069c seq: 0x1 flg: 0x04
consistency value in tail: 0x069c0501
check value in block header: 0xabfe, computed block checksum: 0x0
spare1: 0x0, spare2: 0x0, spare3: 0x0
***
LGWR: terminating instance due to error 227
Thu Oct 24 12:47:03 2002
Instance terminated by LGWR, pid = 1148


Please help or any suggestion