Database in suspect mode

i was going through this article about recovering a database in suspect mode :
http://www.mytechmantra.com/LearnSQLServer/Repair_Suspect_Database_P2.html
in the article the error seems to indicate corruption in the log :
Error: 9003, Severity: 20, State: 9. The log scan number (189624:16:2) passed to log scan in database
'BPO' is not valid. This error may indicate data corruption or that the log file (.ldf) does not match the data file (.mdf
if the corruption is in the log, then is not the logical solution to bypass the recovery process and then truncate the log with no_log option and then bring the database online?
and dbcc checkdb (<db>,repair_allow_data_loss) repairs the data pages or the log pages?
and any other options/ways/articles about bringing a suspect database online?
appreciate the insights.

datafile corruption : put db in emergency mode / put db in single user mode / dbcc checkdb with REPAIR_ALLOW_DATA_LOSS/ dbcc checkdb on database
again/put db back in multi user mode.
There is no need to do this. This is totally not required.
You can
Switching the database to the Simple recovery model
Performing a checkpoint (which should clear the active log as long as nothing else requires the log to be kept active)
Switching back to the Full recovery model
Reestablishing the log backup chain by performing a full or differential backup
Or you can rebuild log as already pointed in my reply.
Or you can restore from known valid backup.
There is no need to move data as well because actually its not related to data.
Please mark this reply as answer if it solved your issue or vote as helpful if it helped so that other forum members can benefit from it
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Database in Suspect Mode in SQL Server 2000 Log Shipping Environment

Hi All
We have movement of SQL Server 2000 at physical level. We have disable jobs and stop Agent and SQL Server services.
After moved the server we have started the server and then start SQL Server 2000 services.
All of databases in SUSPECT mode. Files are in correct folders as were before shutdown the server
What shall I do e.g. why databases come up in SUSPECT mode? what to check and how to get database live?
Pls help it is critical...
Thanks in Advance

All of databases in SUSPECT mode. Files are in correct folders as were before shutdown the server
What shall I do e.g. why databases come up in SUSPECT mode? what to check and how to get database live?
Pls help it is critical...
Thanks in Advance
Hello,
Did you made sure no transactions like restore logs were running when you stopped SQL server service or agent .I have seen in SQL 2000 an abrupt stop of SQL Server agent when its doing a process can sometimes force database in suspect mode.
I would like you to get your disk analyzed by vendor ASAP for any fault in disk at first go it seems to me an underlying hardware issue.
Please can you check errorlog and event viewer to find out any possible cause for database going into suspect mode
I always suggest to use Backup and restore method of recovery to get out from suspect database problem.If you dont have then you can move with DBCC Checkdb and various repair options but be sure
DATA LOSS might be possible when you use repair allow data loss and repair_rebuild removes constraints.
hope this helps
Please mark this reply as the answer or vote as helpful, as appropriate, to make it useful for other readers

Database in suspect mode...why does it happen?

I am using SQL 2012 SE with A-P clustering. We had an automatic failover around 3:00AM and the replication publisher database went into suspect mode. I gave it some time to see if it would come back to normal mode all by itself and when it did not I took
the db to emergency mode and then single user mode and did dbcc check and then when there were no errors I tried to bring it to multi user mode and it would still remain in emergency mode.
I tried to do take it offline and bring it online.But it wont go offline as it says database is in replication and cannot be taken offline. So I had to broke replication and take the database offline and brought it back online and then restarted the replication
from scratch.
I came to know that the LUN went offline and then came back online and that triggered the failover.
But, why did the publisher database go to suspect mode? I told my IT manager that the underlying disk that went offline was hosting the publisher database and since the disk went down and came back it took the database to suspect mode but he would believe it.
Is there a way that we can tell for sure that a specific issue caused the database go to suspect mode? Like any log/eventvwr? I had transaction log backups running like once every 10 mins for publisher database...could that be a reason?
Also are there any specific causes that will take a database into suspect mode?
Thanks a ton

From my experience most of the problems because of physical disk failure ... look also into Event Viewer.
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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Recover SQL Server database from SUSPECT mode

Hi Expert DBAs,
As I know the database should be restored from backup and logs reapplied. That’s the first and generally recommended approach any time a DB is suspect, whether it’s from log or data file corruption.
But if I have no backups then we follow below steps ( after Googling I found these steps on most of the websites ):
1.EXEC sp_resetstatus ‘yourDBname’;
2.ALTER DATABASE yourDBname SET EMERGENCY
3.DBCC checkdb(’yourDBname’)
4.ALTER DATABASE yourDBname SET SINGLE_USER WITH ROLLBACK IMMEDIATE
5.DBCC CheckDB (’yourDBname’, REPAIR_ALLOW_DATA_LOSS)
6.ALTER DATABASE yourDBname SET MULTI_USER
Now my question is,
1. If after executing DBCC CHECKDB at 3rd step, it shows inconsistency.Then I will execute SET SINGLE USER WITH ROLLBACK & if after executing DBCC CHECKDB at 3rd step, no errors found. Then what will be the steps?
2. When we execute DBCC CHECKDB (' DBNAME ', REPAIR_ALLOW_DATA_LOSS) how can we recover lost data during process.As far as I know some data will loss and if it will happen then business will get suffered.
3. Why run DBCC CHECKDB() WITH REPAIR_ALLOW_DATA_LOSS if there are no consistency errors in the database?
I am stucked in these questions....
Regards,
Yashwant Vishwakarma | SQLOcean.com
Yashwant Vishwakarma | www.sqlocean.com

There is no easy or same steps, it all depends on what error and what caused suspect.
Example is below:
http://www.sql-server-performance.com/2015/recovery-sql-server-suspect-mode/
2) Straight answer would be no you cant recover if no backup. Again it all depends what error checkdb returns and some things can be tried as explained earlier but no guarantee.
The REPAIR_ALLOW_DATA_LOSS option is not the best option for bringing a database to a physically consistent state. If successful, the REPAIR_ALLOW_DATA_LOSS option may result in some data loss. In fact, it may result in more data lost than if a user were to
restore the database from the last known good backup. Microsoft always recommends a user restore from the last known good backup as the primary method to recover from errors reported by DBCC CHECKDB. The REPAIR_ALLOW_DATA_LOSS option is not an alternative
for restoring from a known good backup. It is an emergency “last resort” option recommended for use only if restoring from a backup is not possible.
Certain errors, that can only be repaired using the REPAIR_ALLOW_DATA_LOSS option, may involve deallocating a row, page, or series of pages to clear the errors. Any deallocated data is no longer accessible or recoverable for the user, and the exact contents
of the deallocated data cannot be determined. Therefore, referential integrity may not be accurate after any rows or pages are deallocated because foreign key constraints are not checked or maintained as part of this repair operation. The user must inspect
the referential integrity of their database (using DBCC CHECKCONSTRAINTS) after using the REPAIR_ALLOW_DATA_LOSS option.
https://msdn.microsoft.com/en-us/library/ms176064.aspx

Availability Group Database( secondary) went to Suspect mode. What is the solution?

Hi Folks,
database went suspect mode in secondary server. ( sql 2012 SP1)
1. How to bring online,Is it possible withuot breaking primary.
2. can we access only primary.
3. What are the modes ( not_synchronzing, suspnded etc.)
Could you please explain , how to bring databace into synchronzing mode.
Many Thanks.

Any info in the ERROL.LOG,Event Viewer??? Generally, databases go into suspect mode because disk failure ,io..
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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What is SUSPECT Mode database?

Hi All,
What is suspect mode in sql server and how it happens and how to recover from the suspect database ?\
Please post the article.
Thanks&Regards Siva G

SQL server marks database as suspect due to many reasons; some of them are given below:
Hardware failure
Improper shutdown of the database server
Corruption of the database files
Unavailable device files
Unavailable database files
Database resource used by operating system
SQL Server incorrectly asserts free data page space when a row is inserted
For details click here
http://www.karaszi.com/SQLServer/info_corrupt_suspect_db.asp
http://www.stellarsqldatabaserecovery.com/repair-suspect-sql-server.php
http://sql-server-recovery.blogspot.in/2010/10/repair-restore-sql-server-database-from.html
http://www.slideshare.net/warnor/how-to-restore-sql-server-database-from-suspect-mode
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Database mssql server 2008 is in suspect mode?

Database sql server 2008 is in suspect mode and I am not able to bring the database online and i have no backup to restore.
To resolve this issue run the commands listed below,
EXEC sp_resetstatus ‘DATABASE_NAME’;
ALTER DATABASE DATABASE_NAME SET EMERGENCY
DBCC checkdb(‘DATABASE_NAME’)
ALTER DATABASE DATABASE_NAME SET SINGLE_USER WITH ROLLBACK IMMEDIATE
DBCC CheckDB (‘DATABASE_NAME’, REPAIR_ALLOW_DATA_LOSS)
ALTER DATABASE DATABASE_NAME SET MULTI_USER
But there will be data loss if i execute the above queries.
Is there any alternate solution for this?
Can anyone help me please.

You can use DBCC CheckDB (‘DATABASE_NAME’, REPAIR_REBUILD) instead of REPAIR_ALLOW_DATA_LOSS, which will not cause data loss.
You can get more info at Recover a Corrupt SQL Server MDF Database
For any cases, the best practise is to backup of your corrupt MDF database first.

Database in Suspended Mode

Hi,
I faced this problem suddenly when i was trying some indexes on a local dummy table(using 'sa' user id) on DB COSMOS. After working around indexes i saved the file and closed Query Analyzer. On relogging again with 'sa' user Id i faced the following problem "A connection was successfully established but then an error occured during the login process.(provider : Shared Memory Provider, error:0 - No process is on the other end of the pipe.) "
Then i logged in with Windows Authentication account. however i couldnt access DB COSMOS as it was put in Suspended Mode. On checking the event viewer i found below error
"SQL Server detected a logical consistency-based I/O error: incorrect checksum (expected: 0xb42e9a1f; actual: 0xb45a9f73). It occurred during a read of page (2:0) in database ID 7 at offset 0000000000000000 in file 'E:\COSMIC\COSMOS_log.ldf'. Additional messages in the SQL Server error log or system event log may provide more detail. This is a severe error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online."
Well how the above error can be repaired. There are no backups of this db. I cannot run DBCC CHECKDB command for COSMOS as the same has been suspended.
Please give me the solution to above problem.
Thanks

Hi ,
Thanks for the info. Lekss thanks for that article..it was quite useful.
Please check the below error that i found in error log.
2009-12-29 21:09:45.81 spid20s     Error: 824, Severity: 24, State: 2.
2009-12-29 21:09:45.81 spid20s     SQL Server detected a logical consistency-based I/O error: incorrect checksum (expected: 0xb42e9a1f; actual: 0xb45a9f73). It occurred during a read of page (2:0) in database ID 7 at offset 0000000000000000 in file 'E:\COSMIC\COSMOS_log.ldf'. Additional messages in the SQL Server error log or system event log may provide more detail. This is a severe error condition that threatens database integrity and must be corrected immediately. Complete a full database consistency check (DBCC CHECKDB). This error can be caused by many factors; for more information, see SQL Server Books Online.
2009-12-29 21:09:45.81 spid20s     Error: 3414, Severity: 21, State: 2.
2009-12-29 21:09:45.81 spid20s     An error occurred during recovery, preventing the database 'COSMOS' (database ID 7) from restarting. Diagnose the recovery errors and fix them, or restore from a known good backup. If errors are not corrected or expected, contact Technical Support.
2009-12-29 21:09:45.85 spid53      EMERGENCY MODE DBCC CHECKDB (COSMOS, repair_allow_data_loss) WITH no_infomsgs executed by HOME\ADMIN terminated abnormally due to error state 5. Elapsed time: 0 hours 0 minutes 1 seconds.
by putting my DB in emergency mode i could get the tables.Luckily there were only ten tables. however how do i take backup of the entire database in this case. As mentioned above, on executing DBCC CheckDB ('DBname', REPAIR_ALLOW_DATA_LOSS) after setting dB to single User mode, the system still displayed that the dB was in suspect mode and cannot be opened. Also the other system dbs including master is damaged and in Online mode. how do i get damaged free dBs. What should be done in real live situation where data is very important.

Database in Emergency Mode

Hi All.. i have had one database was in suspect mode and i have changed the status to Emergency Mode and i have run the DBCC checkdb and command didn't gave any error.. after this i have tried to change database to Single_user mode, but command running
successfully, but database status is still showing as Emergency mode only.. i have tried for multi_user mode too..
Also, i have tried to run the command to bring online, but command running for long time with Suspended status..
Could anyone help me on this??

Hi Balajik,
"Also, i have tried to run the command to bring online, but command running for long time with Suspended status.."
In addition to other post, please check the following things.
1. Run sp_who2 to check that if there is blocked process. If blocked process exists, run “KILL <spid>“ to kill it.
2. Make sure that there are no connections to the database from other applications. You can run the below scripts to find connections.
USE master
SELECT * FROM sys.sysprocesses WHERE dbid = DB_ID('DatabaseName')
3. You might need to stop and start SQL Server Service using SQL Server Management Studio, then check if you can set the database online.
Besides, to recover database which is in emergency mode, you can review the following similar thread.
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/4186ba24-5188-4ea9-bb83-f39d44f1897d/database-in-emergency-mode?forum=sqldatabasemirroring
Thanks,
Lydia Zhang
Lydia Zhang
TechNet Community Support

MSDB in suspect mode.

Hi,
I have mssql 2005 installed and i see that MSDB database is marked as suspect. I almost tried all the steps which are submitted in the forums.
1) I shut down the server, navigating to the directory 'd:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Binn' and doing the following: start sqlservr.exe -c -T3608
2) renamed the damaged msdb files (msdbdata.mdf and msdblog.ldf in the 'd:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data' directory)
3) Run the instmsdb.sql script in the 'd:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Install' directory
--x---
When I executed third step it returned me below error:
Msg 926, Level 14, State 1, Line 63
Database 'msdb' cannot be opened. It has been marked SUSPECT by recovery. See the SQL Server errorlog for more information.
Please advice me.

Hi,
As the DB was in the suspect mode it didn't gave me scope to detach the DB. Now the DB is out of suspect mode after succesfully completing the 3rd step of your blog.
However the another issue I found while going through the script (in your blog), instmsdb.sql while going to create msdb database uses the same path of master db. while actual path in the sysdatabase for msdb database is different than master db.
Also 3rd steps is completed succesfully but it doesn't create database anywhere due to this msdb is out of suspect mode but as it doesn't see physical file as per the path specified in sysdatabase it doesn't work and gives below error while accessing properties of any database:
Database 'msdb' cannot be opened due to inaccessible files or insufficient memory or disk space

Database in noarchivelog mode, truncate command issued

Database in noarchivelog mode, truncate command has been issued how to restore the table?
FACTS:-
1. DB In noarchivelog Mode
2. Cannot enable flash back mode because of 1. above
3. No exports available
4. No backup's Available.
Any thoughts ?

Oracle Support/ Professional Services has a Data Unloader (DUL) and ORA-00600 has DUDE, both of which may be able to extract information from data files that are corrupted, where the control files are lost, etc.
These are not, however, cheap utilities. Unless the data itself is really valuable, it is generally not a viable option.
Justin

How to set the database in NOARCHIVELOG mode

hellow world,
I knewly joined this organization.
Our database is very small < 4GB data.
Database is running in ARCHIVELOG MODE.
since we are not keeping any physical backup, so I opted to run the datbase in NOARCHIVELOG mode.
For bringing the database in NOARCHIVE MODE, I simply changed the init.ora parameter LOG_ARCHIVE_START = FALSE and restart the database.
offcourse the archiving stopped, but to my strange after 30 to 40 minutes my all log files filled an error message is being displayed to the server, saying
log files are filled, waiting for the archiving, Oh my God, What has happened, All users came to my head, DATABASE HANGED, NOT RESPONSING.
SIR, MY QUESTION IS
WHAT FOR ALL LOG FILES WAITING?
when i am saying NOARCHIEVE than
please explain me, where i committed mistake. I am new to ADMINISTRATION.

1. Not keeping any physical backup is all the more reason to stay in archivelog mode.
2. You need to shutdown the database, startup mount, and issue 'alter database noarchivelog', the alter database open.

Problem running oracle 9i database in archivelog mode - database freezes

Greetings,
I recently needed to change a (test) database to archivelog mode to make online back-ups of this database. This posed no real problem although I seem to be unable to set the database to automatic archiving eventhough I edited the init.ora file (translation of the "archive log list" output between square brackets):
SQL> archive log list
Databaselogmodus Archiveermodus [Databaselogmode: Archivemode]
Automatisch archiveren Gedeactiveerd [Automatic archiving: Deactivated]
Archiveerbestemming O:\oracle\ora92\RDBMS [Archivedestionation: O:\oracle\ora92\RDBMS]
Oudste on-line logreeks 12306
Volgende logreeks voor archivering 12306
Huidige logreeks 12308
I added this to my init.ora file:
# Archvie Log Destinations
log_archive_start=TRUE
log_archive_dest_1=%ORACLE_HOME%\database\archive
log_archive_format="%%ORACLE_SID%%t_%s.arc"
However, this is not the real problem (maybe it has something to do with it, which is why I mention it aswell), the real problem is that my database freezes when the archive log file is "full". When the archive file reaches ~102.400Kb it just freezes up and I need to restart the database.
The following error is written to the alert_sid.log file:
Thu Apr 17 09:19:55 2008
Thread 1 cannot allocate new log, sequence 12309
All online logs needed archiving
Current log# 2 seq# 12308 mem# 0: O:\ORACLE\ORADATA\O\REDO02.LOG
The problem seems to be that the oracle service can't start a new logfile when the previous one is full. Does anybody know how I could fix this?
Thanks in advance,
Bram

Hello Maran, thanks for your quick response.
I added the output of archivelog list in the original post, but it's in dutch so here's the (loose) translation of the output:
SQL> archive log list
Databaselog mode Archive mode
Automatic archiving Deactivated
Archive destionation O:\oracle\ora92\RDBMS
Oldest on-line logsequence 12307
Next logsequence for archiving 12307
Current logsequence 12309
Maybe something that can help with the troubleshooting:
The archivelog file is written to O:\oracle\ora92\RDBMS but only AFTER the reboot, I've checked SYSTEM rights to the folder and it has full control.
Babu, thanks aswell for your quick response.
The location exists and space is available but the database doesn't seem to load (that part of) the ora.init file because the output of archive log list still refers to %ORACLE_HOME%\rdbms instead of %ORACLE_HOME%\database\archive.
I've now executed alter system archive log all; and am executing the import where the database usually freezes to see if it still happens. So far I already had this written to the alert_sid.log file after executing the command:
Completed: alter database open
Thu Apr 17 10:00:11 2008
ARCH: Evaluating archive log 1 thread 1 sequence 12307
ARCH: Beginning to archive log 1 thread 1 sequence 12307
Creating archive destination LOG_ARCHIVE_DEST_1: 'O:\ORACLE\ORA92\RDBMS\ARC12307.001'
ARCH: Completed archiving log 1 thread 1 sequence 12307
ARCH: Evaluating archive log 2 thread 1 sequence 12308
ARCH: Beginning to archive log 2 thread 1 sequence 12308
Creating archive destination LOG_ARCHIVE_DEST_1: 'O:\ORACLE\ORA92\RDBMS\ARC12308.001'
ARCH: Completed archiving log 2 thread 1 sequence 12308
And new log files were written to the directory (O:\oracle\ora92\RDBMS) and this time I didn't have to reboot for it to happen. Both were 100mb files without the database actually doing all that much though.
Message was edited by:
user616266

How to use Derby database in embedded mode in WebLogic 12c?

I have a JavaEE-6 application that uses Derby database in embedded mode. It uses JPA for persistence. Everything works fine in Glassfish but now I am trying to port it to WebLogic 12c and having issues setting up Derby database in WLS in embedded mode. The derby setup in WLS asks for Host/port and does not have the embedded mode option. Any help is appreciated.
-Prantor

I'm pretty sure this is the wrong forum. "Oracle Application Server" is iAS, not WebLogic.

Running a physical standby database in noarchivelog mode

Primary Database: 2 node rac cluster, 11.2.0.2 GI and RDBMS
Standby Database: single instance 11.2.0.2
OS: AIX 7.1
Hello,
I'm in the process of implementing a data guard standby system. To make this system simpler to admin, I want to run the standby database in NOARCHIVELOG mode. This standby is used only as a mirror of production (to be copied to a 3rd site for separate user activity) and will never be switched to active mode. Maintaining another set of archive logs seems to be redundant to me and another point of failure, so I want to disable archiving. I wanted to ask if any of the DG experts on the forums have ever had experience with this? Does anyone know if this is recommended? I've searched the Oracle Data guard documentation online... it says that the primary obviously needs to be in archive mode, but I'm not seeing anything specific about the standby. Please let me know if anyone has experience with this.
Thanks

Hello again;
If this is the case, then I have nothing to worry about here. Does that sound right to you?Yes.
For this :
b) monthly, shutdown this system and copy it to a 3rd site to host a separate set of business activityI would consider RMAN Duplicate in which case you may avoid the shutdown.
And for this :
resync the "mirror" with productionAll you have to do if DEFER the primary to the standby, then ENABLE and Data Guard will catch up.
--- Will post a detailed example here in a moment.
Right at the first of the year they wanted to work on our Primary server room ( Power ). What I did was switchover to the Standby but I kept log_archive_dest_state_2 on the new primary set to DEFER. Then I shutdown
all the databases at the Primary site. At the end of work two days later I started the databases at the Primary site in standby mode. Switched log_archive_dest_state_2 to ENABLE. When the databases were back in SYNC
I did another switchover and it was done. I used TAF and none of the users even noticed.
Best Regards
mseberg

Database in suspect mode

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