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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We have movement of SQL Server 2000 at physical level. We have disable jobs and stop Agent and SQL Server services.
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All of databases in SUSPECT mode. Files are in correct folders as were before shutdown the server
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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

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

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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MVP

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.

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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/
MS SQL optimization: MS SQL Development and Optimization
MS SQL Consulting:
Large scale of database and data cleansing
Remote DBA Services:
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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
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--x---
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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

What file format Oracle Database 11g can spool data w chinese characters?

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LC_COLLATE="fr_FR.UTF-8"
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BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE     10.2.0.1.0     Production
TNS for Linux: Version 10.2.0.1.0 - Production
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UNIS
草                                                                              Edited by: P. Forstmann on May 27, 2009 10:30 AM
Edited by: P. Forstmann on May 27, 2009 10:33 AM

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Hi VectoriaKoalak,
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regards,
amit m.
Message was edited by: Amit Mittal

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What is SUSPECT Mode database?

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