Tuesday, August 18, 2009

Resolving SQL Server Error 8942

A SQL Server database table is prone to corruption due to unexpected shutdown, application errors, hardware bugs and similar other faults, thereby resulting into DBCC CHECKDB errors or inaccessible table. To resolve such issues, it becomes essential that you restore from the latest database backup. But sometimes, it is not feasible to restore complete information from the backup. Thus, you should use SQL recovery tools to repair these databases.

As an instance, you might encounter the below error with SQL Server table:

Server: Msg 8942, Level 16, State 1
Table error: Object ID O_ID, index ID I_ID, page P_ID. Test (TEST) failed. Slot S_ID, offset 0xADDRESS overlaps with the prior row.


The above error occurs due to overlapping of slots. It primarily occurs when the offset of slot S_ID is not equal or greater to previous slot end. The error is the result of a table test, in which sorted[i].offset has not been found greater or equal to a expected value, 'max'. Here, 'max' signifies the end of last slot and [i] is the ADDRESS.


To troubleshoot these database table errors, you are recommended to consider these methods:

If you are encountering such problems repeatedly, it might be due to hardware issues. So, you need to diagnose the system, application and SQL Server™ error log to know the exact hardware issues, if any. Remove, swap and replace the damaged hardware
If this is not a known hardware problem, restore the database from the recent data backup
In cases, when you don't have any valid data backup, you need to run DBCC CHECKDB command without using any repair clause. This will allow you to determine the exact repair clause required to be applied for database repair. Next, run DBCC CHECKDB with this repair clause.
Applying the above measure can cause data loss. To perform safe database repair, you should use SQL Repair software. These are perfect tools that apply safe scanning algorithms to result effective repair of complete database and its components. SQL Recovery tools are highly competent utilities with graphically rich user interface.

Stellar Phoenix SQL Recovery is a comprehensive SQL Repair utility to repair damaged databases created with SQL Server 2008, 2005 and 2000. It is a fully-competent tool that restores all database components including triggers, stored procedures, views, rules and more. The software is compatible with Windows Vista, XP, 2003, 2000 and NT.

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