Microsoft Sql Server Fatal Error 823
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Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads sql server error number 824 with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a event id 823 print service question and answer site for system and network administrators. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask sql error 825 a question Anybody can answer The best answers are voted up and rise to the top MS SQL Server 2005: Fatal error 823 up vote 2 down vote favorite 1 A MS SQL Server - Database that worked fine for the last https://support.microsoft.com/en-us/kb/828339 weeks suddenly threw the following error: System.Data.SqlClient.SqlException: Warning: Fatal error 823 occurred at date / time Note the error and time, and contact your system administrator. What does this error mean, and what can i do about it? I tried DBCC CHECKDB('mydatabase') but i only got more error messages. Thanks in advance! sql-server share|improve this question asked Jun 19 '09 at 10:33 user10082 145238 add a comment| 3 Answers 3 active oldest votes up vote 5 down vote accepted As Splattne said, 823 means http://serverfault.com/questions/28574/ms-sql-server-2005-fatal-error-823 there's an I/O subsystem problem. An 823 message is what I call a 'hard I/O error'. SQL Server asks the OS to read a page and it says no - this means the I/O subsystem couldn't read the page in question. The CHECKDB output means that it couldn't create the internal database snapshot that it uses to get a transactionally-consistent point-in-time view of the database. There are a number of different causes of this: There may not be any free space on the volume(s) storing the data files for the database The SQL service account might not have create-file permissions in the directory containing the data files for the database If neither of these are the case, you can create your own database snapshot and run DBCC CHECKDB on that. One you have, run the following: DBCC CHECKDB (yourdbname) WITH NO_INFOMSGS, ALL_ERRORMSGS If you post the results, I'll interpret them for you (I wrote DBCC CHECKDB for SQL 2005) Whatever the results are, you're looking at either restoring from a backup, extracting data to a new database, or running repair. Each involves varying amounts of downtime and data-loss. You're also going to have to do some root-cause analysis to figure out what happened to cause the corruption in the first place. Btw - do you have page checksums enabled? Have you looked in the SQL error log or Windows application event log for any signs of corruption or things going wrong with the I/O subsystem? Hope this helps. share|imp
log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of http://dba.stackexchange.com/questions/17995/823-errors-on-tempdb this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Database Administrators Questions Tags Users Badges Unanswered Ask Question _ Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Join them; it only sql server takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top 823 errors on tempdb up vote 4 down vote favorite Have a couple Fiber channel SAN-attached cluster servers which have been intermittently reporting errors like: 2012-05-09 16:31:54.13 spid74 Error: 823, Severity: 24, State: 2. 2012-05-09 16:31:54.13 fatal error 823 spid74 The operating system returned error 38(Reached the end of the file.) to SQL Server during a read at offset 0x000000e11b0000 in file 'T:\tempdb.mdf'. Additional messages in the SQL Server error log and system event log may provide more detail. This is a severe system-level 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. 2012-05-09 16:31:54.13 spid74 Error while allocating extent for a worktable. Extent (1:461024) in TEMPDB may have been lost. SQL Server re-start, which re-creates tempdb, has so far always fixed the issue. Per a Microsoft tech recommendation, I've enabled trace flag 818 ( http://support.microsoft.com/kb/826433 ), but this flag has not yet yielded any fruit [addition ERRORLOG details]; I'm supposing what's happening must not be meeting the criteria for this flag's feature to log extra data. Have a Microsoft case open, and sysadmins and storage vendor looking at things. Also working through http://support.microsoft.com/kb/2015755 , including running sqliosim at one site for ~2.5 hrs. Though there must be something going wrong in