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DBCC error RRS feed

  • Question

  •  Msg 7987, Level 16, State 1, Line 1
    System table pre-checks: Object ID 3 has chain linkage mismatch. (1:151696)->next = (1:147489), but (1:147489)->prev = (1:147488). Check statement terminated due to unrepairable error.
    DBCC results for 'Code'.
    CHECKDB found 0 allocation errors and 0 consistency errors in database 'Code'.

    Hi Friends,

    Kindly help on the above issue - DBCC error

    Tuesday, September 29, 2020 9:59 AM

All replies

  • Explanation

    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 points to page P_ID2; however, the previous page pointer of page P_ID2 points to page P_ID3 but not back to page P_ID1, as it should.

       
    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.

    Run DBCC CHECKDB

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

    http://intelligentsystemsmonitoring.com/knowledgebase/sql-server/system-table-prechecks-object-id-oid-has-chain-linkage-mismatch-pidnext-pid-but-pidprev-pid-check-st-9740/
    • Edited by baleng Tuesday, September 29, 2020 10:10 AM
    • Proposed as answer by baleng Wednesday, September 30, 2020 1:56 PM
    Tuesday, September 29, 2020 10:09 AM
  • Hi Baleng,

    Thanks for the immediate response.

    I found an error with hard disk and I cleared it.

    But issue remained same.Trying with any healthy backup now

    Tuesday, September 29, 2020 10:38 AM