Taking a datafile offline

Hello -
I am running an Oracle 8.1.7.4 database in archivelog mode. Can I take a datafile offline, rename the datafile, then bring the datafile back online?
For example,
1. alter database datafile 'string' offline;
2. rename the datafile at the os level
3. alter database rename file 'string' to 'newstring';
alter database datafile 'newstring' online;
While the datafile is offline, does this cause errors if an attempt is made to access the datafile?

Of course, as already posted, data in the offline datafile are not available, so you cannot access them. In my case, those data were previous years accounting data, and people asked for mounting removable disks when they needed them.

Similar Messages

Taking the datafile offline when the database is in NOARCHIVELOG mode

My question is when the database is in No Archive log mode i'm not able to take the datafile offline.
When i tried in my computer i have noticed fallowing.
case1:
SYS>alter database datafile 5 offline;
ERROR at line1;
ORA-01145:offline immediate disallowed unless media recovery enabled.
case 2:
SYS>alter database datafile 5 offline immediate;
ERROR at line 1;
ORA-00933:SQL command not properly ended
case3:
I have tried the command alter database datafile 6 offline drop; (in NOARCHIVELOG mode) and it is showing the same effect as alter database datafile 6 offline; ( in ARCHIVELOG mode).
*In the NOARCHIVELOG mode are we really dropping the datafile to take the datafile offline? Will you please tell me the effect of keyword drop.

JohnWatson wrote:
You've marked your question answered - was that a mistake?
The answer is that you cannot directly take a datafile offline in noarchivelog mode. You must take the tablespace offline:
Hmm, are you certain about that? Perhaps I'm missing something.
SQL> select file_id, file_name, online_status, status from dba_data_files where tablespace_name = 'USERS';
 FILE_ID FILE_NAME ONLINE_ STATUS
 4 /u01/app/oracle/oradata/TEST/users01.dbf ONLINE AVAILABLE
SQL> select log_mode from v$database;
LOG_MODE
NOARCHIVELOG
SQL> alter database datafile 4 offline drop;
Database altered.
SQL> select file_id, file_name, online_status, status from dba_data_files where tablespace_name = 'USERS';
 FILE_ID FILE_NAME ONLINE_ STATUS
 4 /u01/app/oracle/oradata/TEST/users01.dbf RECOVER AVAILABLE
SQL> ALTER SYSTEM FLUSH BUFFER_CACHE; <-- may not have been necessary
System altered.
SQL> select count(*) from scott.emp;
select count(*) from scott.emp
ERROR at line 1:
ORA-00376: file 4 cannot be read at this time
ORA-01110: data file 4: '/u01/app/oracle/oradata/TEST/users01.dbf'
SQL> recover datafile 4;
Media recovery complete.
SQL> select file_id, file_name, online_status, status from dba_data_files where tablespace_name = 'USERS';
 FILE_ID FILE_NAME ONLINE_ STATUS
 4 /u01/app/oracle/oradata/TEST/users01.dbf OFFLINE AVAILABLE
SQL> alter database datafile 4 online;
Database altered.
SQL> select file_id, file_name, online_status, status from dba_data_files where tablespace_name = 'USERS';
 FILE_ID FILE_NAME ONLINE_ STATUS
 4 /u01/app/oracle/oradata/TEST/users01.dbf ONLINE AVAILABLE
SQL> select count(*) from scott.emp;
COUNT(*)
 14
Also, please see the following link from the manual which discusses altering data file availability in noarchivelog mode.
Altering Datafile Availability

Taking rollback segment and datafile offline caused application error

One of the DBA's added a large rollback segment which caused the rman backup to abort. The rollback segment was taking offline and it's datafile was taken offline, all went normally no errors. An Application started gettting errors the database and application were taking down and up, no errors on either but the problem was still there. The rbs datafile and RBS were placed back online and the application worked properly. It looks as if Oracle let us take the RBS and datafile offline with active segments in the RBS is this possible?? If so it means you can pull the rug out from under Oracle and it doesn't even complain

Pls check any transactions written in application level,
explicitly assigned to the RBs which was taken offline.

Automatic datafile offline due to write error

Hi,
Our SAP system are down. In the alert.log file, i found that one of the files are being locked by third party backup software.
I'm new to both oracle and basis, pls advise the steps to recover the database. Thank you.
The error in the alert log file:
Errors in file f:\oracle\p02\saptrace\background\p02_lgwr_3896.trc:
ORA-00345: redo log write error block 8404 count 2
ORA-00312: online log 3 thread 1: 'D:\ORACLE\P02\ORIGLOGA\LOG_G13M1.DBF'
ORA-27072: File I/O error
OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.
Sat Oct 25 00:23:12 2008
Errors in file f:\oracle\p02\saptrace\background\p02_lgwr_3896.trc:
ORA-00343: too many errors, log member closed
ORA-00346: log member marked as STALE
ORA-00312: online log 3 thread 1: 'D:\ORACLE\P02\ORIGLOGA\LOG_G13M1.DBF'
Sat Oct 25 00:26:04 2008
Incremental checkpoint up to RBA [0x1c1b.2079.0], current log tail at RBA [0x1c1b.20dc.0]
Sat Oct 25 00:35:18 2008
KCF: write/open error block=0x3f7c6 online=1
     file=5 G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2
     error=27072 txt: 'OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.'
Automatic datafile offline due to write error on
file 5: G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2
Sat Oct 25 00:35:19 2008
KCF: write/open error block=0x3f7c4 online=1
     file=5 G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2
     error=27070 txt: 'OSD-04016: Error queuing an asynchronous I/O request.
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.'
Automatic datafile offline due to write error on
file 5: G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2
Sat Oct 25 00:36:00 2008
KCF: write/open error block=0x37f74 online=1
     file=7 G:\ORACLE\P02\SAPDATA1\SR3_4\SR3.DATA4
     error=27072 txt: 'OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.'
Automatic datafile offline due to write error on
file 7: G:\ORACLE\P02\SAPDATA1\SR3_4\SR3.DATA4
Sat Oct 25 00:45:49 2008
Errors in file f:\oracle\p02\saptrace\usertrace\p02_ora_3876.trc:
ORA-00600: internal error code, arguments: [kdtdelrow-2], [2], [2], [], [], [], [], []
ORA-00376: file 5 cannot be read at this time
ORA-01110: data file 5: 'G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2'

Hi
As alway use this information for research purposes only.
I presume that Oracle and SAP application servers are down.
Now would be a good time to make a backup image of your crippled system.
This way you can always get back to this state if needed.
So do an offline backup if possible.
It looks like a log file is damaged or deleted. You may find that you have a
mirror image of it so this might not be the end of the world.
If you have oracle up to the mount point e.g.
startup mount
then you should be able to acces the v$logfile
select GROUP#,STATUS,MEMBER from v$logfile;
This will show you whether the have a mirror setup for the log file you need.
Make sure all the files outlined in this output exist.
e.g. do a DIR in the parant directory.
Post all the output of v$logfile and whether all the files exist.
regards
Stephen

No Online backups due to datafiles offline than I canu0092t recover. How...?

Hi gurus!!!
I got into a problem with some datafiles.
We have MySAP in a BD oracle 9.2.0.6
I used Oracle Entreprise Manager Console to generate two datafiles in the tablespace PSAPPRDUSR,
but I generated them in another tablesapce (PSAPPRD) with a name of file,
size and location very different from those that there uses the tablespace PSAPPRD.
So... I put them offline later to erase them later!!!
The datafiles contains no data.
Later, in the night backup:
 BR0334W Status of database file /oracle/PRD/sapdata4/prdusr_2/prdusr.data2 is RECOVER
 BR0334W Status of database file /oracle/PRD/sapdata4/prdusr_2/prdusr.data2a is RECOVER
 BR0301E SQL error -1128 at location BrTspAlter-3
 ORA-01128: cannot start online backup - file 31 is offline
 ORA-01110: data file 31: '/oracle/PRD/sapdata4/prdusr_2/prdusr.data2'
 BR0280I BRBACKUP time stamp: 2007-04-20 03.01.21
 BR0316E 'Alter tablespace PSAPPRD begin backup' failed
 BR0056I End of database backup: bdvbtndh.ant 2007-04-20 03.01.21

And now... I neither can erase them nor can put online again.
To erase them I used:
SQL> ALTER DATABASE DATAFILE '/oracle/PRD/sapdata4/prdusr_2/prdusr.data2' OFFLINE DROP;
Database altered.
SQL> commit;
But they continue there, do not resign.
To put them online:
SQL> alter database recover datafile '/oracle/PRD/sapdata4/prdusr_2/prdusr.data2';
alter database recover datafile '/oracle/PRD/sapdata4/prdusr_2/prdusr.data2'
ERROR at line 1:
ORA-00279: change 31203204 generated at 04/19/2007 19:30:11 needed for thread 1
ORA-00289: suggestion : /oracle/PRD/oraarch/PRDarch1_2574.dbf
ORA-00280: change 31203204 for thread 1 is in sequence #2574
SQL>
But we have continued working and I don't want to lose any data.
HEEEELP!!!!
What I can do to recover the datafiles and to continue with my daily Online backups?
The BD is in production and I do not have long time to fix it, only a few hours on Saturdays night.

Hi,
alter database datafile offline drop;
This command is not meant to drop a datafile. It is meant to offline the datafile with the intention of dropping the tablespace.
For a tablespace comprising multiple datafiles you can only drop a datafile by dropping the entire tablespace, this will work even you have one datafile.
If you have 10gr2, it's finally possible to drop a datafile as long as
it's not the only datafile within the tablespace, and
the tablespace is only and in read-write status.
So since you are on 9i your situation in summary:
If you have more than one datafile in the tablespace and you wish to keep the objects that reside in the other datafile(s) which are part of this tablespace, then you must export all the objects inside the tablespace.
1. Gather information on the current datafiles within the tablespace by running some query to remember the t/s, segment, and datafile info.
2. Export all the objects that you wish to keep.
3. Once the export is done, issue the DROP TABLESPACE <tablespace name> INCLUDING CONTENTS.
4. Delete the datafiles belonging to this tablespace using the operating system.
5. Recreate the tablespace with the datafile(s) desired, then import the objects into that tablespace.
Hope this helps and good luck,
George

Taking cluster disk offline made all other resources in the group to go offline.

Hi,
We have three node windows 2008 R2 failover cluster. When we tried to take one of the cluster disk offline from a application and services, it made all other resources in that application and services to go offline even though there was no dependency on
this disk. I want to know why it made all other resources to go offline. Can some one clarify please? Is it a default behavior?
Umesh

"When we tried to take one of the cluster disk offline from a application and services, it made all other resources in that application and services to go offline even though there was no dependency on this disk."
I'm a little unclear on your problem description. You state you are taking a "disk offline from a application and services". That implies the disk is necessary for the application and/or service, otherwise there is no way to take it
offline from that application and/or service. Then you state "there was no dependency on this disk". If there was no dependency on the disk, how you could take it "offline from a application and services"?
Using the Failover Cluster Manager consolde, select one of the resources that is going offline. Click on the Resources tab at the bottom of the center window. That resource does not show any dependency on the disk being taken offline?
Does it show dependency on any other resource that is dependent upon the disk you are taking offline?
. : | : . : | : . tim

Datafile offline drop

Dear all,
In my DB, one datafile got corrupted. DB running in noarchive log mode. I took a complete export of the DB. now I took the datafile offline by
alter database datafile 7 offline drop;
now I can able to open the database, now what should I do ?.. still in dba_data_files, this corrupted file is shown..shall I drop this file alone ?.. how ?..I have already 2 other datafiles in the same tablespace ..
Kai

In my DB, one datafile got corruptedHOW??
alter database datafile 7 offline drop; It seems you are using version lower than 10g.This will offline the datafile with the intention of dropping the tablespace.Oracle no longer attempts to access it, but it is still considered part of that tablespace.The datafile is marked offline in the controlfile.So, you will see the datafile in the dba_data_files.The data in the offline datafile won't be available to the users.
But from 10g and higher version, you can finally drop the datafile
alter tablespace tbs_name drop datafile 'datafile_name';
10g link [http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/dfiles.htm#sthref1396]
now I can able to open the database, now what should I do ?What actually you want to do. what do you want to do.
HTH
Anand

TS3276 my smtp server shows offline. I've tried taking all accounts offline and then back on with no effect

email was working fine and then I couldnt send mail from my bellsouth.net account. The smtp server is (offline). I tried taking all accounts offline and then back on. This didn't help.
I can send email from my iphone or webmal on my windows based desktop.
Any suggesstions? I'm not a very experienced Mac user.

What were the results of taking all the applicable steps in the support article?

Taking datafile offline and moving it.

How i can move my datafile? what are steps ?

SYS@db102 SQL> select * from dba_data_files where tablespace_name='TEST';
FILE_NAME
   FILE_ID TABLESPACE_NAME                     BYTES     BLOCKS STATUS    RELATIVE_FNO AUT
MAXBYTES MAXBLOCKS INCREMENT_BY USER_BYTES USER_BLOCKS ONLINE_
/home/ora102/oradata/db102/test01.dbf
         5 TEST                             20971520       2560 AVAILABLE            5 NO
         0          0            0   20905984        2552 ONLINE
SYS@db102 SQL> alter database datafile 5 offline;
Database altered.
SYS@db102 SQL> exit
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
[ora102 ~ db102]$ mv /home/ora102/oradata/db102/test01.dbf /tmp/test01.dbf
[ora102 ~ db102]$ sqlplus / as sysdba
SQL*Plus: Release 10.2.0.1.0 - Production on Tue Sep 26 20:46:25 2006
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
SYS@db102 SQL> alter database rename file '/home/ora102/oradata/db102/test01.dbf' to '/tmp/test01.dbf';
Database altered.
SYS@db102 SQL> recover datafile 5;
Media recovery complete.
SYS@db102 SQL> alter database datafile 5 online;
Database altered.
SYS@db102 SQL> select * from dba_data_files where tablespace_name='TEST';
FILE_NAME
   FILE_ID TABLESPACE_NAME                     BYTES     BLOCKS STATUS    RELATIVE_FNO AUT
MAXBYTES MAXBLOCKS INCREMENT_BY USER_BYTES USER_BLOCKS ONLINE_
/tmp/test01.dbf
         5 TEST                             20971520       2560 AVAILABLE            5 NO
         0          0            0   20905984        2552 ONLINE
SYS@db102 SQL>

Cluster Shared Volume disappeared after taking the volume offline for Validation Tests.

Hi,
After an unknown issue with one of our Hyper-V 4 Node cluster running on Server 2008 R2 SP1 with fibre channel NEC D3-10 SAN Storage all our cluster shared volumes were in redirecting mode and I was unable to get them back online. Only after rebooting all
the nodes one by one the disks came back online. Eventlog messages indicated that I had to test my cluster validation. After shutting down all the virtual machines I set all the cluster shared volumes offline and started the complete validation test. The following
warnings/errors appeared during the test.
An error occurred while executing the test.
An error occurred retrieving the
disk information for the resource 'VSC2_DATA_H'.
Element not found (Validate Volume Consistency Test)
Cluster disk 4 is a Microsoft MPIO based disk
Cluster disk 4 from node has 4 usable path(s) to storage target
Cluster disk 4 from node has 4 usable path(s) to storage target
Cluster disk 4 is not managed by Microsoft MPIO from node
Cluster disk 4 is not managed by Microsoft MPIO from node (Validate Microsoft MPIO-based disks test)
SCSI page 83h VPD descriptors for cluster disk 4 and 5 match (Validate SCSI device Vital Product Data (VPD) test)
After the test the cluster shared volume was disappeared (the resource is online).
Cluster events that are logged
Cluster physical disk resource 'DATA_H' cannot be brought online because the associated disk could not be found. The expected signature of the disk was '{d6e6a1e0-161e-4fe2-9ca0-998dc89a6f25}'. If the disk was replaced or restored, in the Failover Cluster
Manager snap-in, you can use the Repair function (in the properties sheet for the disk) to repair the new or restored disk. If the disk will not be replaced, delete the associated disk resource. (Event 1034)
Cluster disk resource found the disk identifier to be stale. This may be expected if a restore operation was just performed or if this cluster uses replicated storage. The DiskSignature or DiskUniqueIds property for the disk resource has been corrected.
(Event 1568)
In disk management the disk is unallocated, unknown, Reserved. When the resource is on one node and i open disk management i get the warning that i have to initialize the disk. I did not do this yet.
Reading from other posts i think that the partition table got corrupted but i have no idea how to get it back. I found the following information but it's not enough for me to go ahead with: Using a tool like TestDisk to rewrite the partition table. then
rewriting the uniqueID to the disk brought everything back. But still no explaination as to why we had our "High Availability" Fail Over cluster down for nearly 2 Days. This happened to us twice within the past week.
Anybody that an idea how to solve this? I think my data is still intact.
Thanx for taking the time to read this.
DJITS.

Hi,
Error information you provided indicate disk connection failure issue, please confirm shared disk 4 is available:
To review hardware, connections, and configuration of a disk in cluster storage:
On each node in the cluster, open Disk Management (which is in Server Manager under Storage) and see if the disk is visible from one of the nodes (it should be visible from one node but not multiple nodes). If it is visible to
a node, continue to the next step. If it is not visible from any node, still in Disk Management on a node, right-click any volume, click Properties, and then click the Hardware tab. Click the listed disks or LUNs to see if all expected disks or LUNs appear.
If they do not, check cables, multi-path software, and the storage device, and correct any issues that are preventing one or more disks or LUNs from appearing. If this corrects the overall problem, skip all the remaining steps and procedures.
Review the event log for any events that indicate problems with the disk. If an event provides information about the disk signature expected by the cluster, save this information and skip to the last step in this procedure.
To open the failover cluster snap-in, click Start, click Administrative Tools, and then click Failover Cluster Management. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and
then click Continue.
In the Failover Cluster Management snap-in, if the cluster you want to manage is not displayed, in the console tree, right-click Failover Cluster Management, click Manage a Cluster, and then select or specify the cluster that
you want.
If the console tree is collapsed, expand the tree under the cluster you want to manage, and then click Storage.
In the center pane, find the disk resource whose configuration you want to check, and record the exact name of the resource for use in a later step.
Click Start, point to All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
Type:
CLUSTER RESOURCE DiskResourceName /PRIV >path\filename.TXT
For DiskResourceName, type the name of the disk resource, and for path\filename, type a path and a new filename of your choosing.
Locate the file you created in the previous step and open it. For a master boot record (MBR) disk, look in the file for DiskSignature. For a GPT disk, look in the file for DiskIdGuid.
Use the software for your storage to determine whether the signature of the disk matches either the DiskSignature or DiskIdGuid for the disk resource. If it does not, use the following procedure to repair the disk configuration.
For more information please refer to following MS articles:
Event ID 1034 — Cluster Storage Functionality
http://technet.microsoft.com/en-us/library/cc756229(v=WS.10).aspx
Hope this helps!
TechNet Subscriber Support
If you are
TechNet Subscription user and have any feedback on our support quality, please send your feedback
here.
Lawrence
TechNet Community Support

Deleted archive files during the datafile offline period

Dear Gurus
I want to report a mishap that happened in one of our system.
I made one of the data files x01.dbf offline(the only datafile for that tablespace say X )
Now unfortunately i deleted the archives during the period the datafile was offline ..
Now it is not letting me do any operation like any ddl operation ..
How can I restore the database back to normal .
Thanks in advance
abhi

Hi again,
Dear GuruOh la, I'm not a guru, just an old oracle newwbie!
I did not understand what was that 7 error game :)Lesson learned: do not try to translate obscure French stuff :-)
About your problem, if this does not work, you have only one possibility: drop it. If the drop fails you'll have to bounce the database in order to do that.
If you have to "recover" from the tablespace loss, you'll have to do some TSPITR (Tablespace Point In Time Recovery).
HTH,
Yoann.

Taking data file offline and online

When I take a data file offline, which SCN get frozen? Is it the stop scn in the control file or is it the checkpoint scn in the data file header?
Matt

Hi,
When I take a data file offline, which SCN get frozen? Is it the stop scn in the control file or is it the checkpoint scn in the data file header?
Stop SCN is the SCN which gets recoreded in control file when datafile is backup mode or datafile is offline.
Its checkpoint scn in Data File Header. As you the STOP SCN is going to Updated wehn ever there are changes with respective to the datafile.. as it implicitly says that STOP SCN, wit respective Offline datafile will not Update, until next scn generates (until the data file make online)
- Pavan Kumar N

Datafile offline

Dear all
I have just completed a cloning.One of my datafile is offline.
In the control file it is pointing to a different path with a ficticious filename like
/nd01/oradev/devdb/9.2.0/dbs/MISSING00098'
The file I want is under location another location.I tried to generate a trace control file and run it on nomout mode,but still no luck.
Can somebody help me.

I do not have datafile name MISSING.
It generated the name.I tried to generate a script
from alter database backup controlfile to trace.But
still NO LUCK.
Regardsthis's from your original post,
I have just completed a cloning.One of my datafile is offline.
In the control file it is pointing to a different path with a ficticious filename like
>>/nd01/oradev/devdb/9.2.0/dbs/MISSING00098'
Compare your output of
select name from v$datafile;from source and cloned database

Datafile Offline dropped.

I have added a datafile to a tablespace and did the offline drop immediately since it was not adhering to the naming convention.
Is their a way I can get rid off that file since the controlfile still has that entry.
I can't drop and recreate the tablespace bec. of the size constraint (250GB).
DB version: 9.2.0.7
Any help would be really appreciable.

Hi
Have a look at Note:111316.1.
Hope this Helps
Regards

Datafile offline in reade only mode

i read the oracle9i reference and it show me the message
'Read-only mode does not restrict database recovery or operations that change the
database’s state without generating redo data. For example, in read-only mode:
Datafiles can be taken offline and online
Offline datafiles and tablespaces can be recovered
The control file remains available for updates about the state of the database'
first one the message show me is 'datafiles can be taken offline and online' , i think this tell me i can change the datafiles's state online to offline, so when i use
alter database datafile test.ora offline is a error ora-01145 in the noarchivelog mode
but it is successful in the archivelog mode
so could anyone tell the distinct of two mode the database and tablespace offline

The docs are at http://tahiti.oracle.com.
No doubt while reading the docs you will find other valuable information that someone writing you a short paragraph would omit.

Taking a datafile offline

Similar Messages

Maybe you are looking for