Re: No recovery situation

Hello Riyaj,
I have no available database at this moment. Itīs not working, I have only the datafiles asociated with the
previous one (itīs all I could save from my formated computer). I know that I had corrupted blocks because I run the DBVERIFY utility, and it showed me which blocks were
corrupted in the system01.dbf file.
I tried to do a backup but it was impossible for me...

What I have trying to is the creation of a new database and overwriting the previous datafiles on the new ones,
but of course, it doesnīt work.
I suppose If it were possible, then utilities such as backup.. wouldnīt have many sense..
Anyway, if you have any suggestions I would like to listen to it, and if you donīt have, a lot of thanks,

Riyaj_Shamsudeen_at_i2.com wrote:

> Hi
> How did you find you have corrupt blocks ? Did you have any ORA-1578
> errors ? Any alert log messages for the same ?
> I would first find out which objects exist in that particular corrupted
> block (or ) alternatively you could analyze all the objects in the system
> tablespace like this.
> set pages 0
> spool /tmp/exec_as.sql
> select 'analyze table '||owner||'.'||table_name||' validate structure
> cascade;'
> from dba_tables
> where tablespace_name='SYSTEM'
> /
> spool off
> spool /tmp/exec_as1.out
> @/tmp/exec_as.sql
> spool off
> spool /tmp/exec_as.sql
> select 'analyze cluster '||owner||'.'||cluster_name||' validate structure
> cascad
> e;'
> from dba_clusters
> where tablespace_name='SYSTEM'
> /
> spool off
> spool /tmp/exec_as2.out
> @/tmp/exec_as.sql
> spool off
>
> If the corrupted object is an index, depending upon what index is
> corrupted, you could potentially drop and recreate the index..
>
> Thanks
> Riyaj "Re-yas" Shamsudeen
> Certified Oracle DBA
> i2 technologies www.i2.com
>
>
> Beatriz
> Martinez To: Multiple recipients of list
>ORACLE-L <ORACLE-L_at_fatcity.com>
> Jimenez cc:
> <beamar_at_cidau Subject: No recovery situation
> t.es>
> Sent by:
> root_at_fatcity.
> com
>
>
> 02/13/01
> 06:30 AM
> Please
> respond to
> ORACLE-L
>
>
>
> Hello list,
> I know that the answer to my question itīs going to be a negative one,
> but I have to try to do all that I can do.
> Until yesterday I was doing some attempt with an Oracle installation,
> without a backup copy. And, unfortunately, I had to format my computer
> (!!!).
> Now I have the data associated with this installation, I could save the
> datafiles (*dbf). The database was in a non archivelog mode, and what is
> the worst thing of all, it had some corrupt blocks in the system.dbf
> file.
> Could I do something with them, or are they totally unworhty?
> Could anybody give me an advice?
> Maybe it would be easier for me to start from the beginning again....
> A lot of thanks,
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
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> Author: Beatriz Martinez Jimenez
> INET: beamar_at_cidaut.es
>
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-- 
Author: Beatriz Martinez Jimenez
  INET: beamar_at_cidaut.es

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