Ms Sql Server Error 823
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Fatal Error 823 Sql Server 2012
removed. You’ll be auto redirected in 1 second. MSDN Library MSDN Library MSDN Library MSDN Library Design Tools Development Tools and Languages Mobile and Embedded https://support.microsoft.com/en-us/kb/828339 Development .NET Development Office development Online Services Open Specifications patterns & practices Servers and Enterprise Development Speech Technologies Web Development Windows Desktop App Development TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is https://msdn.microsoft.com/en-us/library/aa337267.aspx not being maintained. MSSQLSERVER_823 Other Versions SQL Server 2014 SQL Server 2012 Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2). Details Product Name SQL Server Event ID 823 Event Source MSSQLSERVER Component SQLEngine Symbolic Name B_HARDERR Message Text The operating system returned error %ls to SQL Server during a %S_MSG at offset %#016I64x in file '%ls'. 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. Explanation A Windows read or write request has failed.
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 http://dba.stackexchange.com/questions/17995/823-errors-on-tempdb and policies of this site About Us Learn more about Stack Overflow http://www.sqlskills.com/blogs/paul/dont-confuse-error-823-and-error-832/ 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 sql server community. Join them; it only 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 sql server error Error: 823, Severity: 24, State: 2. 2012-05-09 16:31:54.13 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
on: August 24, 2009 5:30 pm I was reading a thread on SQL Server Central today where someone replied to a question and confused 823 with 832. Now, 823 is a nasty error to get - it says that an I/O operation failed at the OS level and the I/O subsystem is causing corruption - SQL Server didn't even get a chance to check the page checksum (and potentially raise an 824 error). Error 832 is way worse. When you get one, you'll see an error like the following: A page that should have been constant has changed (expected checksum: 1dcb28a7, actual checksum: 68c626bb, database 13, file 'E:\Program Files\microsoft sql server\MSSQL\data\BlahBlah.mdf', page (1:112644)). This usually indicates a memory failure or other hardware or OS corruption. This error occurs *AFTER* a page has been read into memory. Once the page passes all checks as it's read in from disk, it's a known clean page sitting in the buffer pool. When the time comes to update the page and mark it as a dirty page, the checksum is checked again, juuuust to make sure. If the checksum is no longer valid, error 832 is raised. This is saying that something apart from SQL Server stomped on the page while it was in SQL Server's memory - either hardware memory corruption (bad RAM), an OS memory-management bug, or a rogue process writing into SQL Server's memory space. It's really bad. If memory diagnostics don't show up any issues, there's a way to start to track down what's going on, but only by enabling an expensive trace-flag at server startup that prevents untoward accesses to SQL Server's memory unless an exclusive page latch is held. And this should only be enabled under Product Support's supervision. One other thing to consider is taking out half the server's memory and running with one half for a few days, then swapping over and running with the other half - that may allow you to figure out which memory is bad. Newer servers also allow memory mirroring to reduce the likelihood of bad memory causing you actual data corruption, and server management software should be able to pinpoint a bad memory module. So - hopefully you'll never see this - they're very rare - I've only seen a handful in my time. If you do, run memory diagnostics, and if noth