Recover Losted Database

I'm experiencing a new adventure as Oracle Database Administrator (of course as newbie): I presume that database crashed during backup. Now, I can't start up database, I can't recover database, I can't anything. EM says "The database status is currently unavailable. It is possible thet the database is in mount or nomount state. Click 'Startup' to obtain the current status and open the database. If the database cannot be opened, click 'Perform Recovery' to perform an appropriate recovery operation." When I try 'Startup', after credentials and 'job in progress', he returns to first window. I have tried Perform Recovery but result is same.
Can anybody describe me procedure how to recover database step by step? I need to recover data from tables and if it is possible tables.
I have Oracle Database Server 10.1.0 on Windows 2003.
Thx in advance!

Miroslav197 wrote:
Well, when I type "set ORACLE_SID=ORACLE", he says nothing, seems that's OK. When I type sqlplus "/as sysdba", he says 'Insufficient privileges', and ask me user-name. I type sys then he asks password. I type pass. Then he returns message: ERROR: ORA-01033: ORACLE initialization or shutdown in progress. And, again he asks user-name.Well.You get +'Insufficient privileges'+ due to your OS user is not member of ORA_DBA OS group(also provide SQLNET.AUTHENTICATION_SERVICES = (NTS) in $ORACLE_HOME\network\admin\sqlnetora file).
But you can use passwordfile authorization as below
sqlplus sys/yoursyspass@ORACLE as sysdba
startup force;or
set ORACLE_SID=ORACLE
sqlplus sys/yoursyspass as sysdba
startup force;And post result and alert.log there
Edited by: Chinar on Nov 2, 2010 5:07 AM

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957905 wrote:
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Edited by: hem_Kec on Sep 7, 2008 9:07 AM

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N Gasparotto wrote:
bsac14 wrote:
my database is in no archive mode
can you please tell how to restore
yes it is a datafile corruptionYou did not say how you defined that's a datafile corruption. You provide minimum to zero information.
I just need to bring the database up,no need any exact data
I can refresh from prod laterThen drop and recreate database. Basically and since you are not in archive mode, no recover is possible. Period.
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How did you come to the conclusion that your datafile is corrupted? Can you provide and supported logs?
Regards .....

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How to recover a database with archive log

how to recover database with archivle log

Hi,
With in information no one can tell the answer.
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restore database;
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It will map each block from v$database_block_corruption to either a segment or if the block is free.
$ sqlplus / as sysdba
set pagesize 2000
set linesize 250
SELECT e.owner, e.segment_type, e.segment_name, e.partition_name, c.file#
, greatest(e.block_id, c.block#) corr_start_block#
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, least(f.block_id+f.blocks-1, c.block#+c.blocks-1)
- greatest(f.block_id, c.block#) + 1 blocks_corrupted
, 'Free Block' description
FROM dba_free_space f, v$database_block_corruption c
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AND f.block_id <= c.block# + c.blocks - 1
AND f.block_id + f.blocks - 1 >= c.block#
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Below oracle support note will help you :
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The Gains and Pains of Nologging Operations (Doc ID 290161.1)
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Problem in recovering a database on another machine

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Rakesh

Hi.
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/u07/oraexp/PROD/arch/
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I assume that the database was closed normally prior to taking the offline backup.
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Rgds
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