Eseutil Defrag

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Header is the first physical page of the database, which plays an important role in keeping the file's health accurate. Any sort of corruption in the file's header may damage the file. Same is the case with MS Exchange Server database. Header of Exchange Server database file contains information about the state of the file and diagnosis done on the database. Microsoft's eseutil enables you to gather information about the header of Exchange database and if any sort of repairing is done on database using eseutil /p command.

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Eseutil uses /mh switch to help you view the header of the database and to dump the header to know if eseutil /p command is executed on the database. Eseutil mh command is useful from the troubleshooting and diagnosis perspective. Using eseutil mh command, you can complete the following tasks :

  • Confirm the state of database
  • View header of the database
  • Dump the header of the database for diagnosis purpose

Let us see how to execute eseutil mh switch. Before executing eseutil mh, you must confirm the following conditions to be true for getting accurate result:

  • Database is in offline mode
  • Database is dismounted on Exchange Server
  • You have sufficient privileges to execute the command

If any of the above condition is not true then executing eseutil mh command will not be helpful. After you have confirmed that aforementioned conditions are met execute the following command:

Eseutil /mh {Db_file_name.edb | mail.que}

In the preceding command, replace the term Db_file_name.edb with the name of the Exchange database and do not forget to specify the extension of the database i.e. .edb with the file name. After typing the above command in command prompt, press the ENTER key. As you press the ENTER key, information about the database header will be displayed. In case, the header is corrupt, you have to repair it.

For repairing the database file due to the corruption in file's header, you can either use eseutil /p or eseutil /r commands. These commands are used to perform soft recovery and hard recovery of the database, respectively. However, in case, both of these commands get failed to repair the database, use Exchange Server Recovery  - a commendable, outstanding, and professional Exchange repair and recovery tool.

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