Recover database with datafile and logfile

Hi Export,
we have one maxdb database. For some reasons, we have no backup and lost the programs binaries. Is it possble to recover the database with datafile and logfile? and how?
thanks a lot.
Rongfeng

Hello Rongfeng,
1. Please see document u201CHowTo - Creating a clone of a SAP MaxDB databaseu201D at
http://wiki.sdn.sap.com/wiki/display/MaxDB/SAPMaxDBHowTo
and review the section u201CCreating a clone manually via reusing volumes and parameters.u201D
2. You wrote, that you u201Clost all dba passwords.u201D
Please review the SAP note 25591. This note also has the brief description of the database user types.
You are SAP customer, I recommend you to create the SAP message to the component u201CBC-DB-SDBu201D to clarify more details about the problem & find solution for you.
Thank you and best regards, Natalia Khlopina

Similar Messages

Recover database with control and dbf files

Dear all,
How to recover a database whose registery was damaged but it's control and dbf files are still there
Notes there is no dmp files to recover after reinstalling the oracle

Hi,
How to recover a database whose registery was damaged but it's control and dbf files
are still thereWhat do you mean by "registry" damaged? Do you mean Windows Registry?
If you have control files, data files, and online redo log files then you can simply reinstall Oracle Software, create a windows instance (assuming its on Windows) and start the database without any loss.
Regards

Recover database with arc-file

Hi,
my database was in the archive-log and then we had a dataimport and the database crashed, because there was not enough space.
So i brought the database now to the mount status and i want to recover my database.
I take this:
recover database using BACKUP CONTROLFILE
and then it proposed me an archive-file but i must take an other one.
How can i choose the file?
Thanks in advance.
Nicole

And why on Earth are you throwing "using backup controlfile" in there?
ARE you using a backed up copy of your controlfile? No. You haven't mentioned restoring an old copy of the controlfile at all. So if you haven't restored one from backup, why in Heaven's name are you telling Oracle that the control file is out of date? Because that's what that recovery command does.
Once you say, "The control file you are using is not to be trusted regarding which logs have been generated because it's an old one I brought back from a backup made some time in the past", then it's no wonder that Oracle has a brain fit and starts proposing that archives be applied which don't actually exist yet. "Using backup controlfile" means "I will tell you when to stop applying redo, because this ancient controlfile can't do that for me reliably".
It does actually get worse: the fact that your database crashes doesn't inevitably mean you have to recover a thing. Instance crashes are recovered from completely automatically just by restarting the database.
So you probably didn't need to recover your database at all. You've used the wrong command to recover it even if it did. And by claiming your control file is out of date once, it is quite possible that you really do now need to perform a recovery that was originally completely unnecessary.
Not bad for a day's work! :-)
The golden rule of recoveries is: when you're in a hole, stop digging until you've worked out with near-complete certainty why you're in the hole in the first place. Diagnosis is king. Only then do you start planning recoveries.
The second golden rule of any recovery process, once you've started is: only restore from backup those files which are actually damaged. If your control file isn't lost or damaged, it doesn't need restoring. Same goes for any datafile, too.
And the third golden rule is: only recover that which you've restored. If you've restored file 4, you don't issue a "recover database" command. And if you haven't restored file 6, don't say 'recover datafile 6'. And if you haven't restored a binary copy of the controlfile made at some time in the past, don't say "using backup controlfile".
The final, not so much rule as inevitable consequence, is that botched, mistaken, wrong or partial recoveries screw your database up much worse than it was before you did anything. I hope you have a good backup of this database, because you're going to need it.

Hi guys Pls tell me a way to connect db4 database with jsp and which driver

hi guys
Pls tell me a way to connect db4 database with jsp and
also tell me which driver i have to use
also tell me how to connect with excel sheets

take a look at the follwing links. There, you'll find all what you need :
DB4:
http://www.oracle.com/database/berkeley-db/je/index.html
http://www.oracle.com/technology/products/berkeley-db/je/index.html
http://www.oracle.com/database/berkeley-db/db/index.html
http://www.oracle.com/database/docs/berkeley-db-je-datasheet.pdf
Excel:
http://64.18.163.122/rgagnon/javadetails/java-0516.html
Hope That Helps

Archive logs and recovering database with no RMAN

Hello,
I inherited a database with no RMAN backup activated but archive redo logs are activated and generating at every moment.
As there is no rman backup I always thought that those archive redo logs were useless and because of reduced disk space, regularly I delete all of them.
Then I read that archive redo logs can be usefull even if there is no RMAN. Archive redo logs can be used in a recovery situation like this:
set all tablespaces in backup mode
alter tablespace tsp1..tsp100 begin backup;
copy all datafiles
alter tablespace tsp1..tsp100 end backup;
alter database create standby controlfile as 'c:\temp\sbytemp.ctl';
copy of archivelogs from start begin backup time till nowAs I delete my archive logs, I don't have all ones from the first time. My question is:
How many archive redo log files would I need to have? Would I need to have all archive logs that were generated from the first time? Or would be enough to have the last three or four ones?
Thanks
Edited by: user521219 on 21-may-2012 7:50

How many archive redo log files would I need to have?
Would I need to have all archive logs that were generated from the first time?
would be enough to have the last three or four ones?You need all archive redo log from the moment you have started taking full backup.
If you take full backup every night at 1:00 AM, you will need all archive redo logs that have transactions finished at and after 1:00 AM.

Recover database without controlfile and redo logs

Hi guys,
I am doing a testing with an Oracle Database 11.1.0.7.0, I want recover a database in this scenario without using RMAN:
-All controlfiles are missing
-All redo logs are missing
-I have a Backup Controlfile To Trace Resetlogs (bkp_controlfile.sql)
-The database is in archivelog mode
-The database was created with OMF (Oracle Managed Files)
So I have done this steps:
1) When the database was opened I rename all controlfiles and all redo logs
2) Shutdown Abort
3) I run the bkp_controlfile.sql, here I have a problem...
The database put in NOMOUNT, the controlfile was created and started the RECOVER DATABASE USING BACKUP CONTROLFILE, but when run ALTER DATABASE OPEN RESETLOGS; appear this:
ERROR at line 1:
ORA-01113: file 1 needs media recovery
ORA-01110: data file 1:
'/u02/app/oracle/oradata/OMF/datafile/o1_mf_system_68hzcb2z_.dbf'I wasn´t expect this because I don´t want recover a datafile, I only want open with resetlogs.
Any suggestion to help me?
Thanks a lot.

Excelent! Thanks for your answers Markus and Hemant.
In conclusion...
- If we have all redo logs availables we can recreate the control file and recover the database without any problems using backup controlfile to trace noresetlogs*.
- if we haven´t all redo logs availables, there are 2 situations:
1) If the database shutdown properly:_ We will be able to open the database using recover database using backup controlfile until cancel*.
2) If the database doesn´t shutdown properly:_ We won´t be able to open the database with only a backup controlfile to trace.
With all this I close this thread. Was very good experience.
If anyone would add something will be welcome.
Thanks for all
I wish add the results of one of my tests: if I did all the steps in only one session of sqlplus I can shutdown properly the database, but if do the shutdown immediate* in a new session I can´t shutdown properly the database. Here I post the output:
ALL IN ONE SESSION*
[oracle@prueba ~]$ $ORACLE_HOME/bin/sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Wed Sep 22 13:58:10 2010
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> ALTER SYSTEM SWITCH LOGFILE;
System altered.
SQL> SHUTDOWN IMMEDIATE
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> STARTUP
ORACLE instance started.
Total System Global Area 631914496 bytes
Fixed Size                  1315224 bytes
Variable Size             377491048 bytes
Database Buffers          247463936 bytes
Redo Buffers                5644288 bytes
Database mounted.
Database opened.
SQL> SHUTDOWN IMMEDIATE
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> @/home/oracle/bkp_controlfile.sql
ORACLE instance started.
Total System Global Area 631914496 bytes
Fixed Size                  1315224 bytes
Variable Size             377491048 bytes
Database Buffers          247463936 bytes
Redo Buffers                5644288 bytes
Control file created.
SQL> RECOVER DATABASE USING BACKUP CONTROLFILE UNTIL CANCEL;
ORA-00279: change 398764 generated at 09/22/2010 14:09:49 needed for thread 1
ORA-00289: suggestion :
/u02/app/oracle/flash_recovery_area/OMF/archivelog/2010_09_22/o1_mf_1_40_%u_.arc
ORA-00280: change 398764 for thread 1 is in sequence #40
Specify log: {<RET>=suggested | filename | AUTO | CANCEL}
CANCEL
Media recovery cancelled.
SQL> ALTER DATABASE OPEN RESETLOGS;
Database altered.
SQL> ALTER TABLESPACE TEMP ADD TEMPFILE '/u02/app/oracle/oradata/OMF/datafile/o1_mf_temp_69n3z3vv_.tmp' SIZE 50331648 REUSE AUTOEXTEND ON NEXT 655360 MAXSIZE 32767M;
Tablespace altered.
SQL>
ALL IN DIFERENT SESSIONS*
[oracle@prueba ~]$ $ORACLE_HOME/bin/sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Wed Sep 22 13:55:47 2010
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> ALTER DATABASE BACKUP CONTROLFILE TO TRACE AS '/home/oracle/bkp_controlfile.sql' RESETLOGS;
Database altered.
SQL> SHUTDOWN IMMEDIATE
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> STARTUP MOUNT
ORACLE instance started.
Total System Global Area 631914496 bytes
Fixed Size                  1315224 bytes
Variable Size             377491048 bytes
Database Buffers          247463936 bytes
Redo Buffers                5644288 bytes
Database mounted.
SQL> ALTER DATABASE ARCHIVELOG;
Database altered.
SQL> ALTER DATABASE OPEN;
Database altered.
SQL> ALTER SYSTEM SWITCH LOGFILE;
System altered.
SQL> ALTER SYSTEM SWITCH LOGFILE;
System altered.
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
[oracle@prueba ~]$ $ORACLE_HOME/bin/sqlplus / as sysdba
SQL*Plus: Release 11.1.0.7.0 - Production on Wed Sep 22 13:58:10 2010
Copyright (c) 1982, 2008, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> SHUTDOWN IMMEDIATE
ORA-00210: cannot open the specified control file
ORA-00202: control file: '/u02/app/oracle/oradata/OMF/controlfile/o1_mf_69n3x6n5_.ctl'
ORA-27041: unable to open file
Linux Error: 2: No such file or directory
Additional information: 3

How to recover database without controlfile and redo files?

Hi all,
If I just have datafiles using hot backup saving in another machine, and all files in current database were lost including data files,control files and redo log files .
How can I recover database just using hot backup datafiles? without control file, without redo files.
Your help is greatly appreciated.

alter database backup control file to trace
SQL> alter database backup controlfile to trace;
Go to udump folder in oracle home folder check the trace file copy these lines
CREATE CONTROLFILE REUSE DATABASE "O10G1 NORESETLOGS NOARCHIVELOG
MAXLOGFILES 16
MAXLOGMEMBERS 3
MAXDATAFILES 100
MAXINSTANCES 8
MAXLOGHISTORY 454
LOGFILE
GROUP 1 'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\REDO01.LOG' SIZE 10M,
GROUP 2 'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\REDO02.LOG' SIZE 10M,
GROUP 3 'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\REDO03.LOG' SIZE 10M
-- STANDBY LOGFILE
DATAFILE
'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\SYSTEM01.DBF',
'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\UNDOTBS01.DBF',
'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\SYSAUX01.DBF',
'E:\ORACLE2\PRODUCT\10.1.0\ORADATA\O10G1\USERS01.DBF'
CHARACTER SET WE8MSWIN1252
Change the new database name abc
and REUSE replaced by SET and NORESTLOGS replaced by RESTLOGS above lines.
Save as C1.sql
C:\ set oracle_sid=instance name
C:\>sqlplus /nolog
SQL*Plus: Release 10.1.0.2.0 - Production on Tue Apr
11 06:44:28 2006
Copyright (c) 1982, 2004, Oracle. All rights reserved.
SQL> connect / as sysdba;
Connected to an idle instance.
SQL> startup nomount
pfile='C:\oracle\product\10.1.0\admin\jeeno\pfile\jeenoinit.ora'
ORACLE instance started.
Total System Global Area 171966464 bytes
Fixed Size 787988 bytes
Variable Size 145750508 bytes
Database Buffers 25165824 bytes
Redo Buffers 262144 bytes
SQL> @c1.sql
Control file created.
SQL> alter database open resetlogs;
Database altered

Move datafiles and logfiles (Portal 6.0 and Microsoft SQL Server 2000)

Hello,
I have installed EP 6.0 with KMC and TREX. The database is MS SQL Server 2000.
The datafiles and the logfiles of the portal are respectively located in the directory "C:\Program Files\Microsoft SQL Server\MSSQL\Data" and in "C:\Program Files\Microsoft SQL Server\MSSQL\LOG".
I want to move these files in the disk D.
How can I do it ?
Is the procedure described in the site http://support.microsoft.com/kb/224071 correct ?
I thank you for your help.
Regards,
Anne-Marie

Francesc,
Microsoft Exchange Server Integration in EP6.0
The Microsoft Exchange server (subsequently called the Exchange server) is integrated using the Microsoft Exchange server transport. This transport integrates the scheduling capabilities of Exchange Server with SAP Enterprise Portal 6.0. The following versions of Microsoft Exchange server can be integrated with the Enterprise Portal.
· Exchange Server 5.5 SP4
· Exchange Server 2000
· Exchange Server 2003
The transport uses Microsoft Collaborative Data Objects 1.2.1 (subsequently called CDO) to access data from the Exchange server.
You can check for more details on;
http://help.sap.com/saphelp_nw04s/helpdata/en/7a/ec015c8446d447a83776d40f31c84f/frameset.htm
Regards,
James

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.
and 1 more doubt :
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 ?
A. recover logfile block group 2;
B. alter database drop logfile group 2;
C. alter database clear logfile group 2;
D. alter database recover logfile group 2;
E. alter database clear unarchived lofile group 2;
Edited by: user642367 on Sep 18, 2008 8:45 PM

1. A. Since the DB is in archivelog mode, so you can always restore and recover the whole DB including system tablespace datafile till last SCN generated provided the redo record is available in archive/online logfiles.
2. E. Since only redolog is corrupted so archiver won't proceed and hence a db hang is obvious, So, in order to proceed further you need to clear online (un archived log file) and then db will work as usual. Care should be taken that you must take a full backkup of DB(cold backup wherever feasible) as soon as possible after issuing this command. As now you don't have redo info in archivelog files to recover the db in case of a crash.
Please go through Oracle 10g DB Administrators guide (available on OTN) for more details.
Thanks

Recover database with missing archivelog...

Oracle10gR2 RHEL 4
Hi,
I am having a problem. I'm trying to recover my database to an previous point in time but the archive logs that I need were accidentally removed. Is there anyway I can restore it to a previous point in time? None of the SCN's are working no matter how far I go back (note: I can created the database lastweek so it can't go further than that).
Thanks
RMAN> recover database until time "to_date('2008-04-08:17:47:00','YYYY-MM-DD:HH24:MI:SS')";
Starting recover at 14-APR-08
using channel ORA_DISK_1
starting media recovery
archive log thread 2 sequence 4 is already on disk as file +FLASH1/vmracdev/archivelog/2008_04_08/thread_2_seq_4.290.651538751
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 04/14/2008 16:11:11
RMAN-06053: unable to perform media recovery because of missing log
RMAN-06025: no backup of log thread 1 seq 9 lowscn 153309685 found to restore
RMAN> recover database until SCN 153330712;
Starting recover at 14-APR-08
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 04/14/2008 16:12:40
RMAN-06556: datafile 1 must be restored from backup older than scn 153330712
RMAN> recover database until SCN 153266607;
Starting recover at 14-APR-08
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 04/14/2008 16:15:01
RMAN-06556: datafile 1 must be restored from backup older than scn 153266607

Ok, I am trying that but I get the following error:
RMAN> recover database until SCN 153219977;
Starting recover at 17-APR-08
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of recover command at 04/17/2008 13:33:00
RMAN-06004: ORACLE error from recovery catalog database: RMAN-20208: UNTIL CHANGE is before RESETLOGS change
And this is the latest SCN I have.
Thanks

Programming the Oracle Database with Java and Web Services: sample chapter

This will be the first book devoted to Java in the Oracle Database: read the sample chapter @ http://www.oracle.com/technology/books/pdfs/mensah_ch1.pdf
This book also covers the latest Oracle JDBC, Oracle SQLJ, JPublisher and Database Web Services A brief description @
http://www.elsevier.com/wps/find/bookdescription.cws_home/706089/description#description
Thanks, Kuassi

Hi Kuassi,
Thanks for letting us know that your book is available. I have been following one of your articles about "Virtualize Your Oracle Database with Web Services". More specifically "The Database as Web Services Consumer". I think that this is an area that has in the past been under estimated as to the potential benefits.
I am currently trying to develop a solution that consumes several interfaces with a couple of them being published web services, so an ideal solution. I have then spent the last three weeks having to read up about the architecture of Java in the database, Jpublisher and make sense of how it all works together.
I have got very close to getting one of the web services to work but failed due to using 10gR2 where all the java & libraries has moved to version 1.5. The solution is to load the jdk1.4.2 and configure jpublisher to use this. So far so good except this is not available on some platforms, Windows - 64 bit (not itanium).
The configuration is proving very challenging but will hopefully reap rewards.
(Thought I would give you some background to my experience).
Anyway my question to you is having looked at Jdeveloper it appears to do almost anything except consume services into the database, also with Java now being at version 1.5 outside the database for 10gR2 and supporting 1.4 inside, do you see some alignment of these in future database releases?
Finally off to buy your book now as no doubt there is a huge amount more to learn.
Kind Regards
David O'Donnell

Using databases with Flash and PHP

Hi, everyone!
I`m a PHP newbie. I just learned PHP so that I can use
databases with Flash.
I`ve got a .php script that contains html that loads up my
.swf file. The .swf file is the core of my site. What I want to
know is if I can call some PHP functions (that I have wrote in the
.php script) from within the .swf file... This functions would
perform the reading and updating of my database.
The only way I know of to modify a database from Flash is
using the POST and GET methods. But that opens up a new browser
window in which the PHP script is called. And that only handles
writing in the database. So, what if I just want to read from the
database some values and insert them into a TextField in Flash? How
do I do that?
Thanks! Ardy

1. Goggle "Flash and mySQL" and you'll get a listing of alot
tutorials
2. I'm also just learning. Here's a great URL to start:
Building with Flash and MySQL
That's right, a Flash-based blog — it sounds a little
loony, but this blog pulls content from a MySQL database and feeds
it into the dynamic Flash frontend ...
www.webmonkey.com/programming/php/tutorials/tutorial2.html -
20k - Cached -

How to query Database with Parameters and configure null value response?

Hi,
1.When capture attributes from forms & after applying several logics, passing to a DB table using an API, how to get relevant values for a given parameter in another DB table ?
2.When a DB table is queried, if the value does not exist, how to configure the response message ?
Thanks.

Okay, you've provided exactly what John S. asked for - and no more. This is helpful, but not enough. I think we're going to need a use case to understand exactly what you are asking. What should the user see? What does the user do next? What should happen in the database and in the application when the user does this?
However, I'll try to read between the lines a bit, and get you part of the way there. To query the database with parameters in ADF BC, you need a View Object (VO). The simplest thing to do is create the SELECT command behind the VO with some bind variables and add the bind variables to your VO. At that point, you will get an ExecuteWithParameters operation in the Data Control. You can drag that operation onto a JSF page and it will give you an option to create a parameter form to let the user fill in the parameters to set the bind variables, and a button to execute the query with these values. Any table or form based on that same VO will show the selected data.
A Trinidad or ADF Rich Faces table will have an attribute to let you define some text to show the user if no data was retrieved by the query. But there are other ways to determine if data was retrieved which you can use to control other ways to display this information. For instance, I have a page that has an outputText component that has a "rendered" attribute to show the text only when there was no data retrieved by a query.

To recover a database with old and new datafiles.

Hi;
Please Give a Solution for the following problem.
First I shutdown the databae.
Copy all the redolog,control file and Datafile except one.
One datafile i miss at the time of copy.
Then I start the database and do some transactions.
At that time my system tablespace has been corrupted.
So i copy the old backup and overwrite with the actul file.
So one file backup is not there, that i forgot to take.
At the time of opening the database it shows that datafile version is higher than the controlfile.
Now what i did is came to mount stage and type the following command.
ALTER DATABASE DATAFILE <FILENAME> OFFLINE DROP;
After that i open the database.
Now the problem is that missing file contain very important data.
Is it possible to recover the data?
Please give me an immediate solution.

Is the database running in archive log mode? Do you have any export dump files for the data in question?

Recover database with corrupt datafile

I have an Oracle 9.2.0.6.0 database which has crashed due to disk failure & there is no backup. on the disk that failed there is one rollback datafile so I was hoping to be able to just drop this datafile & the related tablespace & recreate on disk that is OK.
I found the following instructions in a thread on this forum & managed the offline drop of the datafile & the alter database open. However when I tried to drop the rollback tablespace it couldn't find what I though the tablespace was. Now when I try & do anything with the DB is failed with the error -
Error 376 happened during db open, shutting down database
USER: terminating instance due to error 376
Instance terminated by USER, pid = 47050
ORA-1092 signalled during: ALTER DATABASE OPEN...
the instructions I was following were :-
Database was NOT cleanly shut down
I.e. Datafile was accidentally dropped using operating system command, when the database was not cleanly shutdown using SHUTDOWN ABORT COMMAND.
* Check the alert.log file for this instance.
* Comment out the ROLLBACK_SEGMENTS parameter and add the following line: corruptedrollback_segments = ( ,...., ) i.e., the above list should contain all the rollbacks originally listed in the ROLLBACK_SEGMENTS parameter.
* Mount the database in restricted mode. STARTUP RESTRICT MOUNT
* Offline drop the lost datafile.
ALTER DATABASE DATAFILE OFFLINE DROP;
* Open the database.
ALTER DATABASE OPEN.
* Drop the rollback tablespace to which the datafile belonged.
* Recreate the rollback tablespace with all its rollback segments. Remember to bring the rollbacks online after you create them.
* Make the database available to all users.
* ALTER SYSTEM DISABLE RESTRICTED SESSION;
You should be able to see your database back at this step.
Any ideas how to indentify the tablespace that I need to drop & how to get the database into a state that will let me attempt this?

latest entries in alert.log ...
Mon Jan 18 15:32:33 2010
Errors in file /dwdb1/u01/oracle/app/oracle/admin/PLYDW/bdump/plydw_smon_33822.t
rc:
ORA-01595: error freeing extent (2) of rollback segment (13))
ORA-00376: file 6 cannot be read at this time
ORA-01110: data file 6: '/dip3/u07/oradata/PLYDW/dwrbs01.dbf'
SMON: about to recover undo segment 2
SMON: mark undo segment 2 as needs recovery
SMON: about to recover undo segment 3
SMON: mark undo segment 3 as needs recovery
SMON: about to recover undo segment 4
SMON: mark undo segment 4 as needs recovery
SMON: about to recover undo segment 5
SMON: mark undo segment 5 as needs recovery
SMON: about to recover undo segment 6
SMON: mark undo segment 6 as needs recovery
SMON: about to recover undo segment 7
SMON: mark undo segment 7 as needs recovery
SMON: about to recover undo segment 8
SMON: mark undo segment 8 as needs recovery
SMON: about to recover undo segment 9
SMON: mark undo segment 9 as needs recovery
SMON: about to recover undo segment 10
SMON: mark undo segment 10 as needs recovery
SMON: about to recover undo segment 11
SMON: mark undo segment 11 as needs recovery
Mon Jan 18 15:32:46 2010
Errors in file /dwdb1/u01/oracle/app/oracle/admin/PLYDW/udump/plydw_ora_52948.tr
c:
ORA-00376: file 6 cannot be read at this time
ORA-01110: data file 6: '/dip3/u07/oradata/PLYDW/dwrbs01.dbf'
Mon Jan 18 15:32:46 2010
Error 376 happened during db open, shutting down database
USER: terminating instance due to error 376
Instance terminated by USER, pid = 52948
ORA-1092 signalled during: alter database open...

Recover database with datafile and logfile

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