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Difference between Exchange Databases Physical and Logical Corruption

  • Article

 

Physical corruption – when the database from an ESE structure is no longer valid in some way

Logical corruption – when the data within the database is no longer valid, but the structure from an ESE perspective is valid

 

Physical corruption cannot replicate. It’s simply not possible with Exchange replication process. Exchange performs a multi-step process to validate the healthiness of the log file prior to replay on the passive copies (in fact Exchange even validates a log file after it is closed on the source now in SP1).

 

 

Logical corruption can replicate. So how can do you deal with logical corruption?

· You can move the mailbox, thereby deleting the bad data. Useful, especially when logical corruption occurred outside the backup retention window.

· You can use single item recovery and restore the original item. Useful when editing message caused corruption (client app caused corruption scenario).

· You can use the Calendar Repair Assistant to detect and correct inconsistencies that occur for single and recurring meeting items for mailboxes homed on that Mailbox server so that recipients won't miss meeting announcements or have unreliable meeting information.

· You can use New-MailboxRepairRequest which can address corruptions with search folders, item counts, folder views, and parent/child folder issues.

· You can maintain an Exchange backup (VSS backup or lagged copy if backup retention window is between 0 and 14 days).

Comments

  • Anonymous
    January 01, 2003
    EDB Repair tool is repair and recover corrupted or damaged edb file, in order to save all the private information stored in it. Software scan thoroughly MS exchange server database and repair and recover corrupted one. After recovery software converts it to PST file format which is then easily usable with the MS Outlook application. For more information visit http://repaircorruptededbfile.blogspot.in">http://repaircorruptededbfile.blogspot.in

  • Anonymous
    January 01, 2003
    For an easy and quick conversion of edb to pst format, I can suggest you to go in for a utility tool which does such operations quickly.

    Visit:- http://www.recoverydeletedfiles.com/exchange-server-edb-recovery.html

  • Anonymous
    January 01, 2003
    I would also like to mention here an other excellent and more advance professional application named Edb to Pst Converter, you can instantly repair and convert damaged or deleted EDB file to PST file within minutes. For more information about this software visit : http://www.filesrecoverytools.com/edb-to-pst-converter.html

  • Anonymous
    October 02, 2010
    Is there any way to prevent the corruption from happening, like delaying the replication (not to be instant), and how we can detect the corruption if it occurred?.

  • Anonymous
    October 02, 2010
    You forgot to mention lagged copies as a way to recover.  Can you please add how to detect logical corruption issues so you know what method to use?

  • Anonymous
    May 08, 2012
    Logical corruption in Microsoft Exchange Server is a very common problem faced by users. It could occur due to corruption with Information Store, Tables, Keys, Indexes or sometimes to whole database. Logical database corruption is more problematic and difficult to identify than the physical database corruption. The database administrator and users are generally unaware of logical corruption incidence. Unluckily Exchange Server does not contain any in-built utility to diagnose it. Only a third party Exchange database recovery application may help the users to work around the logical as well as physical database corruption issues. One such application is : www.recover-computerdata.com/exchange-server-recovery.html

  • Anonymous
    January 30, 2014
    I agree with Terry Brown Nice description. Thanks http://www.edbtopst-converter.com/exchange-recovery.html

  • Anonymous
    May 04, 2015
    A corrupt/damaged Exchange database (.edb) file can be the result of several reasons like dirty shutdown, hardware problem, database header problems, antivirus software scanning, log file(s) corruption or loss etc. Whatever be the cause, the corruption in EDB file leads to inaccessibility of the users mailboxes. In case, this built-in tool does not work, then users have to opt for a third party repair program.

    Here is one such unique : - http://www.pcrecoveryutility.com/exchange-server-recovery.html

    You just try the free trial version and get the results.

  • Anonymous
    July 29, 2015
    Now very one can resolve jet errors from MS exchange server with Exchange Server Recovery software which can easily recover EDB emails according to date like- "To date" to "From Date" into multiple formats-( PST,MSG, HTML,EML) file format. It also works on whole versions of EDB file- 5.0 up to 2013.

    To download visit: http://www.softmagnat.com/exchange-server-recovery.html



  • Anonymous
    September 04, 2015
    Through Exchange Edb Recovery software which can easily recover data EDB file from corrupt EDB file and export mailbox EDB file with whole mailbox elements- Inbox, Outbox, Sent Items, Deleted Items, Draft, Journals, Tasks, Calendars, Notes, and Contacts.

    For more help visit: http://www.undeletepcfiles.com/exchange-edb-recovery-tool.html

  • Anonymous
    April 12, 2016
    Look this exchange server recovery tool helps you to recover EDB File and allows you to recover public folder with email properties like To, Cc, BCC, Date and Time in just few minutes. It smoothly open .EDB file to PST. - See more at:http://www.mozesoft.com/edb-to-pst-converter.html orhttps://softcart.wordpress.com/edb-to-pst-converter/