Possible Database Corruption

  • One of my DBCC checktable failed with below message. When i manually executed it ran fine, no error messages. I couldn't find anything directly related to this message.

    Date and time: 2015-08-22 05:12:23

    Command: USE [MyDb]; DBCC CHECKTABLE ('[dbo].[MyTable]') WITH NO_INFOMSGS, ALL_ERRORMSGS, DATA_PURITY

    Msg 5269, Level 16, State 4, Server MyServer, Line 1

    Check terminated. The transient database snapshot for database 'MyDb' (database ID 9) has been marked suspect due to an IO operation failure. Refer to the SQL Server error log for details.

    Sqlcmd: Error: Microsoft SQL Server Native Client 10.0 : Unspecified error.

  • Part of the DBCC process creates a snapshot of the database. That snapshot was marked corrupted due to an I/O issue (undetermined from here). So your main database is fine.

    However, it suggests that you might have issues on your disk or with your I/O sub-system... Maybe. Check the error logs in the OS to see if there's additional information there. If you're on a SAN, check there. Otherwise, it might just be a one-off glitch. They happen, rarely.

    "The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
    - Theodore Roosevelt

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    SQL Server Execution Plans
    SQL Server Query Performance Tuning

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