RE: Lost ofall redo logs

I agree with you Joe.

I would *never* use an undocumented parameter unless Oracle told me to (or unless I was testing something that I could recreate).

Using these params on the advice of someone from this list is very dangerous.

The larger question is, why are the redo logs not being backed up?

Arun, you need to establish a backup policy *immediately* so that you are not being put into this position again.

Tom Mercadante
Oracle Certified Professional

-----Original Message-----
Sent: Thursday, September 19, 2002 7:48 AM To: Multiple recipients of list ORACLE-L

KG, doesn't anyone think not having a backup is a bad thing.

You can go down that route if you wish but as I remember undocumented parameters are best used with the assistance of OWS and not just used at will.

joe

K Gopalakrishnan wrote:

>Arun:
>
>You are right. The original poster *clearly* said
>
>LOST ALL REDO LOGS
>NO BACKUP.
>
>In the above situation, you have to open the
>databases using the some special tricks and
>I don't think you need to go back and refer
>BAckup and Recovery Manuals (You can not
>find anything for this situation, that is
>another story)
>
>Those parameters will bring up the database
>if the database is cleanly shudowned (read:
>Shutdown Normal/Immediate) and you will
>have to do some more tricks to get the
>database up if it is crashed (read: shutdown
>ABORT).
>
>I don't think it is a bad advice..
>
>YMMV
>
>KG
>
>
>-----Original Message-----
>Chakrapanirao
>Sent: Wednesday, September 18, 2002 11:08 PM
>To: Multiple recipients of list ORACLE-L
>
>
>Well one I do want to make clear I have never tried to give bad advice to
>people.
>Since the user in his mail had said that he does not have a backup and does
>not have any online redo logs can you please let me know how else can he
>open the database, when he said he does not have a back it assumes that he
>does not have a os backup and also the rman backup.
>This might be the undocumented thing but this Is the only way it works
>And this had happened in one our case and the only way we could open the
>database is to force open the database in a corrupt mode take an export and
>import back into the new database.
>
>If you still think I am trying to give a bad advice well sorry that I am
>giving bad advices.
>
>
>-----Original Message-----
>Sent: Thursday, September 19, 2002 12:33 AM
>To: Multiple recipients of list ORACLE-L
>
>Arun, since WHEN has been using undocumented parameters the normal way
>of doing things, I think you need to go back and lookup backup/recovery
>concepts.
>
>Feel free to read both user managed and RMAN backup recovery
docs/scenarios.
>
>You are giving bad advice to people on the list who might be new.
>
>joe
>
>
>Arun Chakrapanirao wrote:
>
>
>
>>The only way u can open your database is to add a parameter file
>>as
>>
>>_allow_resetlogs_corruption=TRUE
>>
>>_corrupted_rollback_segments= TRUE
>>
>>_offline_rollback_segments=(the rollback segment names)
>>
>>activate the database and then immediately take an export of the whole
>>database.
>>Create a new database and then import all the data to this new database.
>>
>>
>>-----Original Message-----
>>Sent: Wednesday, September 18, 2002 5:23 PM
>>To: Multiple recipients of list ORACLE-L
>>
>>Nop, all redo logs gone away...
>>
>>----- Original Message -----
>>To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
>>Sent: Wednesday, September 18, 2002 5:43 PM
>>
>>
>>
>>
>>
>>
>>>What about mirrored redo group members?
>>>
>>>Igor Neyman, OCP DBA
>>>ineyman_at_perceptron.com
>>>
>>>
>>>
>>>----- Original Message -----
>>>To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
>>>Sent: Wednesday, September 18, 2002 4:30 PM
>>>
>>>
>>>Hi people...
>>>
>>>What to do if I have LOST ALL REDO LOGS and i don4t have any backup?
>>>
>>>Thanks in advance!
>>>
>>>:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
>>>Gilberto Gampert Universidade de Passo Fundo
>>>Administrador de Banco de Dados Passo Fundo - RS - Bra5il
>>>gampert@upf.br http://www.upf.br
>>>:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
>>>
>>>
>>>--
>>>Please see the official ORACLE-L FAQ: http://www.orafaq.com
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>>>Author: Gilberto Gampert
>>> INET: gampert_at_upf.br
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>
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> INET: jtesta_at_dmc-it.com
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  INET: NDATFM_at_labor.state.ny.us

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