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up Recent PostsRecent Posts Popular TopicsPopular Topics Home Search Members Calendar Who's On Home » SQL Server 7,2000 » Data Corruption » DBCC Checkdb consistency errors DBCC Checkdb consistency errors how to fix consistency errors in sql server database Rate Topic Display Mode Topic Options Author Message Yulia Fuller-382525Yulia Fuller-382525 Posted Saturday, April 26,
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2008 6:11 PM Forum Newbie Group: General Forum Members Last Login: Thursday, December 20, 2012 8:29 AM Points: 2, Visits: 115 Hello All, checkdb found 0 allocation errors and 2 consistency errors in table After restoring the SQL Server 2000 user database backup into one of the SQL Server 2000 instances I get database consistency errors. I restored this database a couple of times and every time I get the errors; however https://support.microsoft.com/en-us/kb/2015748 they are not consistent - different types of errors, different tables and indexes get affected. The first time this happened I rebuilt the indexes and it resolved the errors. This time rebuilding the indexes didn't help. I tried all dbcc checkdb options and finally used the last one -repair_allow_data_loss. I restored the same database backup into a different server and ran dbcc checkdb over it - no errors occurred. Something causes corruption in the database on http://www.sqlservercentral.com/Forums/Topic491094-265-1.aspx one particular server. Here are the errors:DBCC results for 'tTREE_COMPONENTS'.Server: Msg 8928, Level 16, State 1, Line 1Object ID 1467308437, index ID 0: Page (1:251481) could not be processed. See other errors for details.Server: Msg 8944, Level 16, State 1, Line 1Table error: Object ID 1467308437, index ID 0, page (1:251481), row 44. Test (ColumnOffsets <= (nextRec - pRec)) failed. Values are 87 and 57.There are 663 rows in 16 pages for object 'tTREE_COMPONENTS'.DBCC results for 'tACCUMULATORS'.There are 10234724 rows in 97149 pages for object 'tACCUMULATORS'.CHECKDB found 0 allocation errors and 2 consistency errors in table 'tACCUMULATORS' (object ID 1467308437).DBCC results for 'WATSTARTDATETP'.Server: Msg 8928, Level 16, State 1, Line 1Object ID 1905493917, index ID 4: Page (3:224866) could not be processed. See other errors for details.Server: Msg 8941, Level 16, State 1, Line 1Table error: Object ID 1905493917, index ID 4, page (3:224866). Test (sorted [i].offset >= PAGEHEADSIZE) failed. Slot 159, offset 0x1 is invalid.Server: Msg 8942, Level 16, State 1, Line 1Table error: Object ID 1905493917, index ID 4, page (3:224866). Test (sorted[i].offset >= max) failed. Slot 0, offset 0x9f overlaps with the prior row.There are 4 rows in 1 pages for object 'WATSTARTDATETP'.DBCC results for 'ACCRUALTRAN'.There are 5919148 rows in 150538 pages for object 'ACCRUALTRAN'.CHECKDB found 0 allocation errors and 3 consistency errors in table 'ACCRUALTRAN' (object ID 1905493917).How would you determine the
This description of DBCC CHECKDB and how to use it is an update of an article I http://www.sqlcopilot.com/dbcc-checkdb.html wrote on SQL Server Pro several years ago. When I first wrote this article I was in the process of recruiting a senior DBA and https://helpdesk.kaseya.com/entries/36234978-SQL-Database-consistency-errors-and-resolution I was surprised at the lack of knowledge about database corruption and how to deal with it! Most candidates were aware that they should run dbcc checkdb DBCC CHECKDB to check for corruption, but most also thought that the solution should be to run it again with one of the repair options! This is dangerous, as it can cause data loss. So here is how to use DBCC CHECKDB, and what to do when you have database corruption. dbcc checkdb errors So How Do I Use It? The primary purpose is to check for consistency errors, and should ideally be run every day. The basic syntax is: DBCC CHECKDB ('YourDatabase') WITH NO_INFOMSGS NO_INFOMSGS prevents an excessive number of informational messages from being generated. There are several other options, but this is the syntax you should aim to use as it performs all integrity checks. This may take a long time on large databases and you may want to specify the PHYSICAL_ONLY option. This checks physical on-disk structures, but omits the internal logical checks. The syntax is: DBCC CHECKDB ('YourDatabase') WITH PHYSICAL_ONLY It Has Found A Problem - What Do I Do? This article is about the approach to take to recover the corrupt data, but don't forget to investigate the cause. Corruption, thankfully, is very ra
database backup failed.Check Data and Index Linkage - [Microsoft][ODBC SQL Server Driver][SQL Server]Table error: Object ID 0, index ID 0, page ID (1:76056). The Page Id in the page header = (0:0).[Microsoft][ODBC SQL Server Driver][SQL Server]Object ID 1790629422, index ID 0: Page (1:76056) could not be processed. See other errors for details.[Microsoft][ODBC SQL Server Driver][SQL Server]CHECKDB found 0 allocation errors and 1 consistency errors not associated with any single object.[Microsoft][ODBC SQL Server Driver][SQL Server]CHECKDB found 0 allocation- OR-You run a DBCC CHECKDB on the Kaseya database and it reports 1 or more consistency errors. The built in Kaseya backup is failing because of an inconsistency in the database - hopefully just the index files. However, the database may require a data loss in order to repair this correctly. ANSWER In order to backup the Kaseya database until this issue is resolved, you'll need to manually run an online backup of the database from within SQL Enterprise Manager or SQL Management Console. Depending on the time this issue takes to resolve, you may wish to schedule a backup this way temporarily. Note that until the database consistency issues are resolved, these backups should be marked as 'bad' because of the inconsistency contained in them. Then, run a DBCC CHECKDB on the database as outlined in the MSDN articlehttp://msdn2.microsoft.com/en-us/library/ms176064.aspx Just run the DBCC CHECKDB without specifying a repair option to start with. Check the last four lines of the output to assess which repair level to use. If you receive an error of the form 'repair allow data loss is the minimum repair level for the errors found by DBCC CHECKDB (ksubscribers).' the database has experienced corruption to the point where it requires data loss in order to repair. At this point, you should check to ensure that you have a good backup of the Kaseya database in which to recover to in the event of the database repair failing to resolv