Microsoft Sql Server 2005 Error 824
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Sql Server Fatal Error 824
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a logical IO error. Logical IO error means that the page is read from the disk successfully, but there is something wrong with the page. The error-824 caused due to many reasons, some are: Problem with underlying storage system. The hardware sql server detected a logical consistency-based i/o error invalid protection option or a driver that is in the path of the I/O request. There are inconsistencies complete a full database consistency check (dbcc checkdb) in the file system. The database file is damaged. File system corruption. Here is more explanation with a live example of error-824: page_verify checksum Msg 824, Level 24, State 2, Line 1. SQL Server detected a logical consistency-based I/O error: incorrect checksum (expected: 0x7532c420; actual: 0x320e4240). It occurred during a read of page (1:342) in database ID 15 at offset 0x00000020e24000 https://support.microsoft.com/en-us/kb/2015756 in file ‘D:\Data\SomeDB.mdf'. 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. A logical consistency error is a clear indication of actual damage and frequently indicates database corruption http://data-base-recovery.blogspot.com/2011/09/how-to-resolve-error-824-in-sql-server.html caused by a faulty I/O subsystem component. It can be fixed without data loss, you only need to refer to your backups and perform a restore. Follow these simple steps, if you don't have updated backup: Stop SQL Service. Copy and Save your corrupted SQL Server database. Now Start SQL Service Create an empty SQL Server database with the same name. Detach the empty database and Replace it with the corrupted ones in the SQL instance folder or where you keep your databases. After applying the above steps run the query given below: EXEC sp_resetstatus 'yourDBname' ; ALTER DATABASE yourDBname SET EMERGENCY DBCC checkdb('yourDBname ') ALTER DATABASE yourDBname SET SINGLE_USER WITH ROLLBACK IMMEDIATE DBCC CheckDB ('yourDBname' , REPAIR_ALLOW_ DATA_LOSS) ALTER DATABASE yourDBname SET MULTI_USER In case the following procedure won't work then it is recommended to go for third party SQL recovery software to resolve Error-824 in SQL Server Database. Posted by Adam Gorge at 1:47 AM Email ThisBlogThis!Share to TwitterShare to FacebookShare to Pinterest Labels: recover sql, sql database recovery, sql recovery, sql repair 12 comments: AnonymousJuly 12, 2012 at 8:14 AMExcellent post, i was searching for this solution, and this post showed me the way.Thanks!ReplyDeleteAnonymousSeptember 27, 2012 at 7:36 AMWonderfull! After hours of browsing internet, here I found my happiness!Thank you Adam and long life t
handle error 824? Discussion in 'SQL Server 2005 General DBA Questions' started by pcsql, Jan 8, 2008. pcsql New Member A client has encountered the error 824 and the sql server log contains http://www.sql-server-performance.com/forum/threads/how-to-handle-error-824.25022/ this information: SQL Server detected a logical consistency-based I/O error: torn page (expected signature: https://www.mssqltips.com/sqlservertip/2871/troubleshooting-and-fixing-sql-server-page-level-corruption/ 0x55555555; actual signature: 0x55565555). It occurred during a read of page (3:757128) in database ID 5 at offset 0x00000172150000 in file 'c:mydata... Running dbcc checkdb on that database returns no error. What are the possible causes for torn page? Should I ask my client to run some MS utilities? I find a MS utility named SQLIOSim. Thanks for any help. sql server pcsql, Jan 8, 2008 #2 Luis Martin Moderator Check: http://technet.microsoft.com/en-us/library/ms174425.aspx HTH Luis Martin, Jan 8, 2008 #3 pcsql New Member Hi Luis, I have also read that page but I don't know how I can use the data from the suspect_pages table to resolve the error or pinpoint which database object is corrupted. Thanks. pcsql, Jan 8, 2008 #4 satya Moderator What level of service pack on SQL you have here? Also I would suggest sql server detected this is a hardware based problem that is causing torn page and error on the data file, could be a controller issue or mismatch of firmware drivers. Check Event logs for Hardware problems. Database corruption is usually caused by failing hardware, and obviously a good idea to fix the hardware before proceeding. Maybe a disk in a RAID failed and the controller failed to complete the disk write (that would cause a Torn page error); a power cut could probably do it too. Additionally look at the TEMPDB contention too. FOr data correction you could create another table and use DTS to import rows from this troubled table, as RESTORE will not have resolution as it will restore the corrupted page again. satya, Jan 9, 2008 #5 pcsql New Member Hi Satya, I believe the server pack is either SP1 or SP2 of SQL Server 2005. The SQL Server 2005 is installed on a virtual server. I also speculate that it is hardware problem. Should DBCC CHECKDB report torn page corruption? Is torn page a physical corruption or a logical (not sure how to term this) corruption happened during I/O? The error for my client occurred during high I/O. If it is hardware problem, should MS tool like SQLIOsim.exe report errors? pcsql, Jan 9, 2008 #6 satya Moderator [] Too many q
Related Tips: More > Disaster Recovery Problem Corrupt SQL Server databases are the worst nightmare of any SQL Server professional. In any environment, from small business to enterprise, the compromise of integrity and availability of the data can constitute a business emergency. This is especially the case in those organizations reliant on an OLTP data model, for a high-volume website. SQL Server database corruption and disruption of the transaction processing system can cause business repercussions such as large financial losses, a drop in reputation or customer retention, or contractual SLA problems with the service provider, if not managed in-house. This tip will demonstrate the diagnosis process, discuss one method of correcting page-level corruption without using the REPAIR options with the DBCC CHECKDB command and outline how to get the SQL Server back online. Solution Diagnosis - SQL Server Corruption Normally any business will have contingency plans to deal with SQL Server database corruption scenarios, and any good database professional will have immediately thought of a number of strategies to deal with these. Items such as disaster recovery plans, replication, Database Mirroring\AlwaysOn, Clustering, etc. However, sometimes these options are not appropriate. Imagine you have a 20GB database populated with records of your customers and records of each transaction linked back to your customers. You have two .mdf data files. You are using the full recovery model, full backups are taken daily at 21:00 with transaction log backups taken every 15 minutes. You don't use mirroring, replication or clustering, instead of relying on a robust backup model to protect your data. At 20:00, a message like this occurs: Msg 824, Level 24, State 2, Line 1 SQL Server detected a logical consistency-based I/O error: unable to decrypt page due to missing DEK. It occurred during a read of page (3:0) in database ID 10 at offset 0000000000000000 in file 'c:\del\corruption_secondary.mdf'. 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