Exchange recovery in case of Page Checksum Mismatch

Microsoft Exchange Server includes the procedure to become aware about file level damage caused to its pages in Exchange database. Using ESEUTIL utility with /K switch, you can detect errors in databases at both the page level and the file level. If this wonderful utility results into errors, then it is sure that one or more pages of your database are corrupt.

The most common errors and symptoms that are associated with file-level damage to an Exchange database are as follows:

• “1018 JET_errReadVerifyFailure”: This error is page level is typically caused by driver, firmware, or hardware issues, although page-level damage might also be caused by problems in Exchange Server.
• “1019 JET_errPageNotInitialized”
• Microsoft Outlook is not started at the client side
• Sending/receiving of messages fails

What causes a page checksum error?

Exchange Server reports -1018 error when a page in the database file holds any one of the following conditions:

• The stored checksum on the page does not equal the result of the checksum recalculation that is performed when the page is read.
• The page number on the database page is incorrect.

How to resolve page checksum errors?

Pages that fail due to error -1018 are treated by Exchange Server as completely unreadable to prevent action on random data from causing further problems in the database. To resolve page checksum errors, follow these steps:

• Run system diagnosis to check for RAM or other firmware related issues.
• Restore the database from the valid and available backup
• Update the firmware and system BIOS with their latest versions available
• Use the Eseutil.exe /D switch to do an offline defragmentation of the database.
• Use the Eseutil.exe /P switch to repair the database.

If any of the above mentioned methods does not resolve the issues, then the last and most reliable option is the use of Exchange Recovery tools. Competent and powerful Exchange recovery software are implemented with technologically advanced algorithms for fixing all types of corruption issues. Kernel for Exchange Server repair efficiently recovers emails, email data, attachments, images, folders, tasks, notes, journals, appointments, sent items, permanently deleted emails, email properties and every other item which is there in the user mailbox without harming the actual  contents.

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