Cluster smon_scn_to_time is corrupted

Question

Hi,
our database is automatically shutdown.i saw in alert log file it say that
ora-00604:error occured at recursive sql level 1
ora-1578 : oracle data bock corrupted (file#1,block 3726)
ora-01110 : data file 1:'c:\pracle\oradata\bmms\system01.dbf'
we dont have rman backup so that i can recover the specific block.we have logical backup
i fire a select statement it show that
sql>select tablespace_name,segment_type,owner,segment_name from dba_extents
where file_id=1
and 3726 between block_id AND BLOCK_ID + blocks -1;
output is
tablespace_Name=system
segment _type=cluster
owner=sys
segment_name=smon_scn_to_time
i search on the google we can repair the block usin dbms_repair package but i dont get idea how to do it please any one suggest me how to recover the block or any solution .it cause the database down automatically thrice in day.quick response will be highyl appreciated.thanks a lot inadvance

Answer 1

You don't have a logical backup ... you have nothing. If it isn't RMAN it isn't a backup. The word that may well apply is toast: Hopefully not burnt toast.
Open an SR at metalink and if you are a religious person apply prayer liberally.
If you really want to try DBMS_REPAIR I have full demos of its functionality in Morgan's Library at:
www.morganslibrary.org/library.html
And, if you succeed, immediately take an RMAN backup and then do so religiously every 24 hours thereafter.
Warning to everyone that has bought into the total nonsense that EXP and DataPump Exports are backups: They are not.