Ms Sql Error 824
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Sql Server Detected A Logical Consistency Based I O Error Invalid Protection Option
824 12 posts,Page 1 of 212»» Fatal error 824 Rate Topic Display Mode complete a full database consistency check (dbcc checkdb) Topic Options Author Message sergio hisergio hi Posted Wednesday, May 16, 2007 9:15 AM SSC-Enthusiastic Group: General Forum Members Last sql server detected a logical consistency-based i/o error: torn page Login: Wednesday, June 12, 2013 11:06 AM Points: 146, Visits: 26 Im using sql2005 and in a simple query in the mngt studio return the error: Msg 21, Level 24, State 1, Line 1Warning: https://support.microsoft.com/en-us/kb/2015756 Fatal error 824 occurred at May 16 2007 11:07AM. Note the error and time, and contact your system administrator.Someone know what is this error and how to fix it ?Thanks Post #366410 Grant FritcheyGrant Fritchey Posted Thursday, May 17, 2007 6:52 AM SSCoach Group: General Forum Members Last Login: Today @ 1:32 PM Points: 17,058, Visits: 31,945 You got trouble in River City. According to MS:The 824error indicates http://www.sqlservercentral.com/Forums/Topic366410-338-1.aspx that a logical consistency error was detected during a read. A logical consistency error is a clear indication of actual damage and frequently indicates data corruption caused by a faulty I/O subsystem component. Time to get kicking with DBCC. I hope you've been testing your backups on a regular basis. ----------------------------------------------------"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood..." Theodore RooseveltThe Scary DBAAuthor of: SQL Server Query Performance Tuning and SQL Server Execution PlansProduct Evangelist for Red Gate Software Post #366766 Camilo TorresCamilo Torres Posted Thursday, May 17, 2007 6:54 AM SSC-Enthusiastic Group: General Forum Members Last Login: Friday, August 21, 2015 1:05 PM Points: 102, Visits: 45 I have seen it before.Right click on My Computer icon, select manage, Open the Event Viewer Tree, Select Application and check there for the time of the error to see what happened to your system. If nothing there then do the same on the SQL Server Machine is connected remotely. Post #366767 mobilemobile Posted Tuesday, November 18, 2008 10:45 AM Forum Newbie Group: General Forum Members Last Login: Friday, May 9, 2014 2:56 PM Points: 1, Visits: 15 - ha
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 https://www.mssqltips.com/sqlservertip/2871/troubleshooting-and-fixing-sql-server-page-level-corruption/ compromise of integrity and availability of the data can constitute a business emergency. http://improve.dk/sql-server-corruption-recovery-when-all-else-fails/ 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 sql server 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 sql server detected 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
a number of SQL Server corruption recovery techniques for when you’re out of luck, have no backups, and the usual methods don’t work. I’ll be using the AdventureWorksLT2008R2 sample database as my victim. A Clean Start To start out, I’ve attached the downloaded database and it’s available on my SQL Server 2008 R2 instance, under the name of AWLT2008R2. To ensure we’ve got a clean start, I’ll run DBCC CHECKDB with the DATA_PURITY flag set, just to make sure the database is OK. DBCC CHECKDB (AWLT2008R2) WITH ALL_ERRORMSGS, DATA_PURITY DBCC results for 'AWLT2008R2'. Service Broker Msg 9675, State 1: Message Types analyzed: 14. Service Broker Msg 9676, State 1: Service Contracts analyzed: 6. Service Broker Msg 9667, State 1: Services analyzed: 3. Service Broker Msg 9668, State 1: Service Queues analyzed: 3. Service Broker Msg 9669, State 1: Conversation Endpoints analyzed: 0. Service Broker Msg 9674, State 1: Conversation Groups analyzed: 0. Service Broker Msg 9670, State 1: Remote Service Bindings analyzed: 0. Service Broker Msg 9605, State 1: Conversation Priorities analyzed: 0. DBCC results for 'sys.sysrscols'. There are 805 rows in 9 pages for object "sys.sysrscols". DBCC results for 'sys.sysrowsets'. There are 125 rows in 1 pages for object "sys.sysrowsets". DBCC results for 'SalesLT.ProductDescription'. There are 762 rows in 18 pages for object "SalesLT.ProductDescription". ... CHECKDB found 0 allocation errors and 0 consistency errors in database 'AWLT2008R2'. DBCC execution completed. If DBCC printed error messages, contact your system administrator. Enter Corruption As I don’t want to kill my disk drives just to introduce corruption, I’ll be using OrcaMDF’s Corruptor class instead. First up we need to shut down SQL Server: SHUTDOWN WITH NOWAIT Server shut down by NOWAIT request from login MSR\Mark S. Rasmussen. SQL Server is terminating this process. Once the instance has been shut down, I’ve located my MDF file, stored at D:\MSSQL Databases\AdventureWorksLT2008R2.mdf. Knowing the path to the MDF file, I’ll now intentially corrupt 5% of the pages in the database (at a database size of 5,312KB this will end up corrupting 33 random pages, out of a total of 664 pages). Corruptor.CorruptFile(@"D:\MSSQL Databases\AdventureWorksLT2008R2.mdf", 0.05); At this point I have no idea about which pages were actually corrupted, I just know that 33 random pages just got overwritten by all zeros. Uh Oh After restarting the SQL Server instance and