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Causes and Fixes for Logical Corruption in Exchange Server Database
Like other databases, Microsoft Exchange Server database (EDB file) may also corrupt at some point of time and does not let you perform typical Exchange Server operations. The corruption can be of two types - Logical and Physical. Logical corruption is pretty common and occurs due to internal fault in the database. When it happens, Microsoft Exchange Server database becomes totally unusable and you encounter serious data loss. MS Exchange Server does not include any utility to detect and fix logical corruption. Thus, you are required to opt for Exchange Recovery to get your valuable data back.
You may encounter logical corruption of EDB file due to any of the following reasons:
1.If you incorrectly run the soft recovery using eseutil /r tool after restoring database from an online backup, it replays only log files and ignores the patch files. It may result in logical corruption. Extensible Storage Engine 98 does not let you run the soft recovery on an EDB file that needs hard recovery. In case you try this, the following Jet error appears in Application Event Log of Exchange Server:
“JET_errSoftRecoveryOnBackupDatabase (-544)”
2.If you initialize an inconsistent EDB file, the process checks whether that log range specified in database header is there in directory of log, and signatures of both log and database are correct. In case it does not find the specified values, it logs the below event:
“JET_errRequiredLogFilesMissing (-543)”
3.The database may also face logical corruption if you run eseutil /p utility. Jet-level Exchange Server database repairs result in some inefficient disk space uses and data loss, because it fixes the EDB file by deleting the corrupt data.
Resolution
To fix this problem and ensure effective Microsoft Exchange recovery, follow the underwritten steps:
1. Defragment the database using eseutil /d command and then run database integrity check using Isinteg -fix command.
2. Restore corrupt EDB file from the most recent backup. You should not run the soft recovery after restoring from backup as it may cause further damage.
3. Use third party Exchange recovery software to repair and restore the problem database.
The Exchange recovery tool is particularly designed to perform in-depth scan of entire EDB file and extract all inaccessible data from it. They offer simple and secure Exchange Server Recovery due to their rich graphical user interface and non-destructive nature.
Stellar Phoenix Exchange Mailbox Recovery is the most efficient and comprehensive exchange server recovery tool to offer exchange database recovery in all EDB corruption scenarios. It restores emails, contacts, tasks, notes, journal, attachments, appointments, and other EDB file objects. The exchange user profile recovery software works well with MS Exchange Server 2007, 2003, 2000, and 5.5.
You may encounter logical corruption of EDB file due to any of the following reasons:
1.If you incorrectly run the soft recovery using eseutil /r tool after restoring database from an online backup, it replays only log files and ignores the patch files. It may result in logical corruption. Extensible Storage Engine 98 does not let you run the soft recovery on an EDB file that needs hard recovery. In case you try this, the following Jet error appears in Application Event Log of Exchange Server:
“JET_errSoftRecoveryOnBackupDatabase (-544)”
2.If you initialize an inconsistent EDB file, the process checks whether that log range specified in database header is there in directory of log, and signatures of both log and database are correct. In case it does not find the specified values, it logs the below event:
“JET_errRequiredLogFilesMissing (-543)”
3.The database may also face logical corruption if you run eseutil /p utility. Jet-level Exchange Server database repairs result in some inefficient disk space uses and data loss, because it fixes the EDB file by deleting the corrupt data.
Resolution
To fix this problem and ensure effective Microsoft Exchange recovery, follow the underwritten steps:
1. Defragment the database using eseutil /d command and then run database integrity check using Isinteg -fix command.
2. Restore corrupt EDB file from the most recent backup. You should not run the soft recovery after restoring from backup as it may cause further damage.
3. Use third party Exchange recovery software to repair and restore the problem database.
The Exchange recovery tool is particularly designed to perform in-depth scan of entire EDB file and extract all inaccessible data from it. They offer simple and secure Exchange Server Recovery due to their rich graphical user interface and non-destructive nature.
Stellar Phoenix Exchange Mailbox Recovery is the most efficient and comprehensive exchange server recovery tool to offer exchange database recovery in all EDB corruption scenarios. It restores emails, contacts, tasks, notes, journal, attachments, appointments, and other EDB file objects. The exchange user profile recovery software works well with MS Exchange Server 2007, 2003, 2000, and 5.5.
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