Error 5242 means that SQL Server found a structural inconsistency on one database page. Official documentation gives no repair steps and tells you to contact technical support. Execute an integrity check to find the damaged objects and then restore from a good backup. Use the repair options only as a last resort because they can delete data.
Your query stops and SQL Server shows message 5242 with a database name and a page number. Damaged data sits behind that message and you need a clear plan.
This guide explains what error 5242 says, how to find the damage and how to restore your data without losing more of it. All commands are untested and follow the official pages.
What is SQL Server Error 5242?
Microsoft lists the message as an inconsistency detected during an internal operation in a database on a given page. It explains the error as a structural fault on the database page named in the message. See MSSQLSERVER_5242.
Its text ends with the advice to contact technical support and gives a reference number. Microsoft publishes no further user action on that page.
What Causes Error 5242?
Microsoft does not name a cause. Page damage in SQL Server tends to trace back to the storage layer, so check these areas first.
- Disk or controller faults. Check the Windows event log and the vendor tools.
- Sudden shutdown. Power cuts can interrupt a page write.
- Memory errors. Faulty memory can write bad data to a page.
- Malware. Harmful software can damage database files.
These causes come from general SQL Server practice and not from the Microsoft error page.
How do You Find the Damaged Page?
Microsoft states that DBCC CHECKDB checks the logical and physical integrity of every object in the database. See DBCC CHECKDB.
DBCC CHECKDB (ErrorDemoDB) WITH NO_INFOMSGSThen check the suspect pages table in msdb. Microsoft states that SQL Server records pages with I/O errors 823 and 824 there. See the suspect pages table.
SELECT * FROM msdb.dbo.suspect_pagesHow do You Fix Error 5242?
- Copy the database files before you try any repair.
- Restore the database from the last known good backup. Microsoft recommends this first for every integrity error.
- Restore only the damaged pages when the backup chain exists. See how to resolve SQL Server page level corruption.
- Use REPAIR_REBUILD when no backup exists. Microsoft states that it makes repairs without data loss.
- Use REPAIR_ALLOW_DATA_LOSS only when nothing else works.
Microsoft calls REPAIR_ALLOW_DATA_LOSS an emergency last resort. It can cause more data loss than a restore and it needs single user mode. Learn more in the guide to DBCC CHECKDB alternatives.
What should You Do After the Repair?
- Back up the database. Microsoft advises a backup after repairs finish.
- Check constraints. Execute DBCC CHECKCONSTRAINTS after a data loss repair.
- Fix the cause. Test the disk and memory so the error does not return.
Frequently Asked Questions
What does SQL Server Error 5242 Mean?
It means that SQL Server found a structural inconsistency on a database page during an internal operation.
Does Microsoft Give a Fix for Error 5242?
No. Microsoft tells you to contact technical support and lists no user action.
How do I Find Which Page is Damaged?
Check the page number in the error text and query suspect_pages in msdb. Then execute DBCC CHECKDB.
Should I Use REPAIR_ALLOW_DATA_LOSS?
No unless no backup exists. Microsoft calls it an emergency last resort.
Can I Restore Only One Page?
Yes when the database uses the full or bulk logged recovery model and you have a backup that contains the page.
Key Takeaways
- Error 5242 reports a structural inconsistency on one database page.
- Microsoft lists no user action and advises contacting technical support.
- DBCC CHECKDB and the suspect pages table locate the damage.
- Restoring from a good backup beats every repair option.
- Back up the database after any repair.
Sources and References
This guide follows Microsoft documentation. Commands are untested.
- MSSQLSERVER_5242 (Microsoft Learn) learn.microsoft.com
- DBCC CHECKDB (Microsoft Learn) learn.microsoft.com
- Manage the suspect_pages Table (Microsoft Learn) learn.microsoft.com