Datafile got corrupted

Dear Friends
Ours Development project, Here we are using Oracle 8i database on sun solaris 5.8 version. Our database is in ARCHIVELOG MODE only.
Yesterday one of our user datafile got corrupted. and we have only 3days archivelogs. We dont have any physical or logical backup.the one that was available was got deleted.
So how can we recover this datafile and use
need help,
venkat

venkat muthadi wrote:
Dear Friends
Ours Development project, Here we are using Oracle 8i database on sun solaris 5.8 version. Our database is in ARCHIVELOG MODE only.
Yesterday one of our user datafile got corrupted. and we have only 3days archivelogs. We dont have any physical or logical backup.the one that was available was got deleted.
So how can we recover this datafile and use Venkat,
You should maintain your database backup a little more carefully. Saying that "we don't have any and the one we had , got deleted" just shows that the backup/recovery is not taken seriously.
About the corruption, how did the file got corrupted?Is it a file corruption or a block corruption?If its a full file, probably you can go ahead and can recreate the corrupted file with alter database create datafile
http://download-west.oracle.com/docs/cd/A87860_01/doc/server.817/a76993/performi.htm#16272
The only issue is,you need archivelogs since the time the original datafile was created. If this would be more older than the 3 days of archive logs you have, it would be an issue.
To sum up, if you don't have ANY backup, you are mostly out of luck here. That's more true as you are using a very much older and unsupported version of Oracle which is officially not part of main stream, supported releases.
HTH
Aman....

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How to recover database SYSTEM datafile get corrupt ?

Database is in ARCHIVELOG mode, and the datafile belonging to SYSTEM tablespace gets corrupted. Up to what point can I recover the database ?
A. Until last commit.
B. Until the time you perform recovery.
C. Until the time the datafile got corrupted.
D. You cannot recover the SYSTEM tablespace and you must be re-create the database.
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If redologfiles are not multiplexed and redolog blocks get corrupt in group 2, and archiving stops. All redolog files are filled and database activity is halted.
DBWR has written everything to disk. What command can be used to proceed further ?
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B. alter database drop logfile group 2;
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<b>If the datafile get corrupted while creating, what should I do?</b>

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During creation of datafile, if the datafile got corrupted then you can delete the data file and recreate it again. The condition is that the particular data file has not been used after creation.
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one of my Learning Instance sysaux Datafile was corrupted...
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is Point in time Recovery is Possible??

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donald wrote:
Thanks a lot laura
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can i use dbverify
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ya its true,
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erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

Datafile got corrupted

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