Product Name

SQL Server

Product Version


Product Build Number


Event ID


Event Source




Symbolic Name


Message Text

System table pre-checks: Object ID O_ID has cross-object chain linkage. Page P_ID1 points to P_ID2 in alloc unit ID A_ID1 (should be A_ID2). Check statement terminated due to unrepairable error.


The first phase of a DBCC CHECKDB is to do primitive checks on the data pages of critical system tables. If any errors are found, they cannot be repaired; therefore, the DBCC CHECKDB terminates immediately. The next page pointer of page P_ID1 in the data level of the specified object points to a page, P_ID2, in a different object.

User Action

Look for Hardware Failure

Run hardware diagnostics and correct any problems. Also examine the Microsoft Windows system and application logs and the SQL Server error log to see whether the error occurred as the result of hardware failure. Fix any hardware-related problems that are contained in the logs.

If you have persistent data corruption problems, try to swap out different hardware components to isolate the problem. Check to make sure that the system does not have write-caching enabled on the disk controller. If you suspect write-caching to be the problem, contact your hardware vendor.

Finally, you might find it useful to switch to a new hardware system. This switch may include reformatting the disk drives and reinstalling the operating system.

Restore from Backup

If the problem is not hardware related and a known clean backup is available, restore the database from the backup.


Not applicable. This error cannot be repaired automatically. If you cannot restore the database from a backup, contact Microsoft Customer Service and Support (CSS).