EDB Repair Tool

Exchange Server transaction logs are stored on Exchange computer hard drive and are crucial for the working of database (*.edb) file. When you start any Exchange Server, ESE (Extensible Storage Engine) checks the database for consistency. This information is revealed by a specific flag in the database header that shows database status as dirty or clean. The dirty database status indicates that there are some uncommitted transactions that need to be replayed. Exchange tries to replay them at the time of mount, but may fail if cannot read them. The reason can be corruption of log files. Such situations can force you to use an EDB Repair Software.

To comprehend these potential problems, consider you use Exchange Server 2007. You experience an unexpected crash (Dirty database shutdown). The next time when you try to mount the database, it gives the below error message:

-1852 0xFFFFF8C4 JET_errLogCorrupted

Logs could not be interpreted 4294965444

The related event ID is 9513. You can observe the same error when restoring the database from backup.

Cause

Event 9513 in Exchange Server 2007 and the above error suggest that the Information Store Service, which is using ESE, cannot read the transaction log files because they are corrupt. As a result, when you try to mount the database after dirty database shutdown or attempt to restore from backup, ESE fails to replay the log files and also to bring the database to a consistent state.

Solution

Following are few concrete solutions that you can apply to solve the depicted issue:

1. Check the application event log for more ESE events. This can help you to find the specific reasons and solutions to the existing problem.

2. Try to duplicate the behavior- mounting the database or restoring from backup.

3. Try to restore the database while excluding the corrupted log files and its sequence. But this operation will cause data loss

4. Run eseutil /p command. Keep in mind that this is a hard repair command and is likely to delete the corrupted and unreadable pages

5. Use a third-party EDB Repair utility. An EDB Repair Software can analyze the corrupted database and extract the lost data using powerful, yet safe, scanning algorithms.

EDB Repair Tool is an efficient .EDB Repair product that scans corrupted Exchange database and extracts the mailboxes in readable PST files. The software supports Exchange Server 2007, 2003, 2000, and 5.5. With an interactive, user-friendly design, the software is easy to operate. The tool is compatible with Windows 7, Vista, XP, 2003, and 2000.

Most of the Exchange database problems (including corruption) occur because the administrator continues to use the very old hardware without any refresh. Thus, it is suggested to keep a timely check through application log and related information. Once the EDB database corruption is confirmed, the administrator can either restore from a good backup or select an EDB Repair option.

To comprehend such situations, let us consider a problem when you cannot mount the Exchange database. You observe that all Exchange services run without any error, but when you try to mount the database, it reports an error as below:

Event Type: Error

Event Source: ESE

Event Category: Logging/Recovery

Event ID: 412

Date: 7/3/2008

Time: 1:40:37 PM

User: N/A

Computer: SMTPBRMDBALEX2

Description:

Information Store (4948) e53f288d-df1b-47ba-9c3b-901e530848a5: Unable to read the header of logfile E:\exchsrvr\mdbdata\E003C9F3.log. Error -530.

The error indicates that it cannot read the logfile header.

Cause

Error -530 occurs specifically due to signature mismatching of log files. The log file signature makes sure that Exchange may replay a correct set of log files. Each database header includes this signature information of the current log file. In case these values fail to match, error -530 occurs indicating the same.

Solution

To solve the existing -530 error issue, you need to implement solutions like:

1. Restore from the last Information Store backup. Rename the corrupted EDB and STM database and create new databases to restore lost data from backup.

2. Open the command prompt and navigate to the Exchange Server directory (usually, C:\Program Files\Exchsrvr\BIN). Next, run Eseutil /P for the corrupted database.

The command causes corrupted pages to delete and creates unused space. Thus, you need to run Eseutil /D command to defragment the database and then run isinteg -fix repeatedly until you receive no errors or get the same errors after two times.

After running the hard repair through Eseutil /P command, the database may not be stable as data loss is likely. Thus, it is recommended to either move the mailboxes to a new database or run a third-party EDB Repair Software instead of performing the hard repair operation. The EDB Repair tools are exclusively built products designed to scan and repair the corrupted Exchange databases.

EDB Repair Tool is a professional utility that repairs the corrupted EDB database and provides selective mailbox recovery option as *.pst files. The EDB Repair Software has an interactive design that makes it easy to operate. The tool supports Exchange Server 5.5, 2000, 2003, and 2007.

More Exchange Server Resources

Exchange 2007 Recovery:
Exchange 2007 Recovery software recovers e-mails and other related items from the corrupted or damaged EDB and STM database of MS Exchange Server and restores mailboxes in distinct *.pst files.

Exchange 2003 Recovery: Exchange 2003 Recovery tool is an advanced Exchange database recovery utility and can recover all of the objects of EDB file in each and every case of corruption.

Exchange Mailbox Recovery: Exchange Mailbox Recovery software repairs corrupt .edb and .stm files of MS Exchange Server and recover user mailboxes with their respective emails and related items.

Exchange Database Recovery: Exchange Database Recovery software is designed and developed to recover emails from corrupted or damaged database files of MS Exchange Server.This tool restores individual mailboxes in Outlook-usable PST files.

Exchange User Profile Recovery: Exchange User Profile Recovery software Recover user Profile that is comprised in Exchange EDB file.

Microsoft Exchange Server users often upgrade the existing application version to achieve better performance, speed, and features. Since the process directly interacts with the database, you may sometimes observe the process failing because of database corruption, however, there may be other reasons as well. The database may fail to mount and access. If a valid backup is available, you can recover from such situations by restoring from it, otherwise, it is suggested to use EDB Repair tools to repair the database.

For instance, consider a situation when you use Exchange Server 5.5 and upgrade it to Exchange Server 2000. After this, when you try to mount the Private store of Exchange, it fails and gives an error message, similar to below:

“Database “First Storage Group\Private Information Store (NTSRV01)” could not be upgraded to version 3.2. Error 0xfffff9bb.”

This error is associated with event ID 1187 in application event log of Exchange Server.

Cause

The mentioned error indicates that the Setup program has been unable to upgrade the Exchange database in question. It cannot upgrade the database to the specified version. This may occur if:

1. The database in effect is not included in upgrade sequence and is incompatible with the current Microsoft Exchange version.
2. The database is corrupt.

Solution

You should first analyze the error text and try these solutions to recover from this problem:

1. Make sure that the running MS Exchange version is compatible with that of database you are trying to mount. If not, you should try to mount it on a different server installed with required Exchange version.
2. To check if the database is actually corrupted, you should examine the application log for associated events. If it is, restore the database from backup or run eseutil repair utilities. For safe database repair, you are suggested to use third-party Exchange Repair software.
3. Sometimes, the described error may result because of failed upgrade, so you should try to upgrade it again.

The EDB Repair Software are commercial products designed to scan and repair corrupted Exchange databases. These utilities provide an interactive interface and are safe to use.

Stellar Phoenix Mailbox Exchange Recovery is a safe and powerful tool that repairs and restores corrupted Exchange database and extracts all mailboxes in individual *.pst files. The advanced  Repair EDB utility supports Exchange Server 5.5, 2000, and 2003. The tool is compatible with Windows 7, Vista, XP, 2003, and 2000.

Microsoft Exchange Server is a transaction-based and fault-tolerant system and thus, has much better protection against data loss as compare to other messaging applications. Despite of the fact, Exchange Server databases still get corrupt. The common reasons of corruption are abnormal system or power failure, database oversize issues (16 GB), antivirus scanning, virus attack, and application bugs. Such instances can affect any of the Information Store databases, which are Priv.edb and Pub.edb. As an administrator, your primary concern is to restore the data, which is applicable using the last backup or by repairing the database. There are several EDB Repair software available that may work against if the Exchange repair utilities fail and/or backup is not available.

As one of the instances, suppose you experience an unexpected power outage with your Exchange Server computer. After this, when you start the database, you get some events (such as event 467, 9297 etc.) logging in the Application log. When you run eseutil commands to check the database integrity, it gives an error as below:

“Operation terminated with error -338 (JET_errBadParentPageLink, Database corrupted)…”

If you execute isinteg command, this may result no errors.

Cause

The error -338 occurs due to corruption in parent database and is returned by directory manager. It can occur because of unexpected power failure.

Solution

You can solve the above issue by applying these measures:

1. Check the last online backup. If available and valid, restore from it.
2. You can create a new mailbox store and move all possible mailboxes to it
3. If the above solutions don’t work, you can use esesuitl /r (soft recovery) and/or eseutil /p (hard recovery) commands to repair the corrupted database. The latter option can cause data loss as it deletes the corrupted pages. So, it is suggested to backup your database before applying it.

In case, none of these resolutions proves valid, you need a third-party Exchange Repair utility. These software offer safe EDB Repair in each case of database corruption and have high competency to maintain the original database integrity. Moreover, these utilities are quite easy to install and use with self-explaining documentation.

Stellar Phoenix Mailbox Exchange Recovery is a reliable and advanced utility that repairs damaged or corrupted Exchange database. The high-end EDB Repair Tool supports Exchange Server 5.5, 2000, and 2003. The software implements powerful scanning mechanism and restores all the mailboxes in individual *.pst files. The tool is compatible with Windows 7, Vista, XP, 2003, and 2000.

Transaction log files record all the modifications to an Exchange Server database and are crucial for the proper functioning of Exchange. If you remove a log file that has not been written to the associated database, it can bring several issues, the most common being that the database may fail to mount. You can solve this problem by removing all the log files, but you first need to check the database consistency. If it exists in inconsistent state, the solution is to restore from backup or apply an EDB Repair technique.

For instance, consider a scenario in Exchange Server. You try to mount a mailbox store, but the operation fails with the below error message:

“Exchange is unable to mount the database thay you specified. Specified database: Servername\First Storage Group\Mailbox Database; Error code: mapiExceptionCallFailed: Unabble to mount database. (hr=0×80004005, ec=-528)”

The error occurs each time when you try to mount the store. As a result, all the clients connected to server are disconnected.

Cause

The above error can occur if you remove a (or more) log file, which has not been committed to the database yet.

Solution

To solve this issue, you need to move the transaction log files to a different folder. For this, follow the steps mentioned underneath:

• Stop Information Store and all databases in the storage group

• Verify the integrity of database by running esesutil /mh command, followed by database name (for example, for Mailbox Store1 database, name is Mailbox Store1.edb). Examine the ‘State’ value under its header information

• If the database is in Clean Shutdown (Consistent) state, you can safely remove all the transaction log file and save them to a different folder. Make sure you don’t remove the current transaction log file

• If the database is in Dirty Shutdown (Inconsistent) state, restore from the last online backup. In case backup is invalid, run eseutil /r command for soft recovery. If this fails, you can run eseutil /p command for hard recovery or use an EDB Repair Software. The former option (hard recovery) causes data loss as it deletes the corrupted pages. An EDB Repair utility can safely repair a corrupted Exchange database and provides secure data restoration.

Stellar Phoenix Mailbox Exchange Recovery is a powerful solution that repairs and restores Exchange database created with Exchange Server 5.5, 2000, and 2003. The advanced EDB Repair Software extracts all user mailboxes into individual *.pst files and provides option for selective mailbox recovery. The tool is compatible with Windows 7, Vista, XP, 2003, and 2000.

Watch Video: How to Repair EDB File?

An Exchange Server storage group consists various public and mailbox folder stores, however their number depends on the Exchange Server version in use and requirements of the user. The mailbox store contains all user and system mailboxes and is comprised of two files: Priv.edb and Priv.stm. Any corruption to the data repository EDB file leads to data inaccessibility and creates unavoidable situations of using a backup. If it is not possible to restore from backup, you need to repair the corrupted database using Exchange eseutil repair utility or a third-party EDB Repair software.

For instance, consider a situation when you run Eseutil /CC command. The mailbox store fails to mount and returns an unknown error -939586631. Consequently, the stored mailboxes are inaccessible.

Cause

The above error particularly results when you run Eseutil /CC command using the incorrect file path pointing to Restore.env file.

Eseutil /CC is the restore mode command, which is applied to run hard recovery on a database that has been restored from an online backup. Exchange Server creates Restore.env file while restoring from backup to control the hard recovery process.

Solution

Follow the below mentioned steps to recover from the given problem:

1. Run Eseutil /CC command using the correct file path of Restore.env file.
2. Check the database consistency. If it is inconsistent, you can use Eseutil /P and then Eseutil /D command for recovering the database.

Eseutil /P is the hard command that deletes the corrupted data, instead of repairing it. So, after using the command, you may find the database with lost pages and deleted information. For this reason, whenever you find your Exchange database in corrupt state, it is recommended to use a safe EDB Repair Tool.

An EDB Repair application allows you to extract the contained mailboxes and restore them at a safe location from a corrupted database. These software implement safe scanning algorithms, which are effective at repairing the database file. The tools are easy to install and require no prior technical skills to operate them. In addition, you can use these products in any case of logical database corruption.

Stellar Phoenix Mailbox Exchange Recovery is an advanced solution that repairs and restores corrupted Exchange databases. The EDB Repair Tool supports Exchange Server 5.5, 2000 and 2003. It is a secure database repair tool with rich graphic features. The tool extracts all user mailboxes in individual .pst files without modifying its contents.

Exchange Server generates a checksum for a page, which is written to the disk after it writes all the data to the page. This includes writing the page number also. After adding checksum to the page, the Exchange then moves to write pages to the disk. A database page is declared as corrupt if its page number and/or checksum mismatches. In such situations, you should consider repairing the database or restoring from the latest backup. In case when no clean backup is available, you should run an Repair EDB tool

You might come across the below error with your Exchange Server database:

“The database page read failed verification because of a -1018 error (page number mismatch)”

Error 1018 is associated with event 475 displaying in the application event log. The error is generally encountered when you try to perform online backup or online defragmentation.

Cause

The above error is a typical symptom of database damage at page level. It occurs when database page read fails verification because of mismatch in a page number. It indicates that the database page that has been referenced in the store file is damaged. Such errors are usually observed because of firmware, hardware or driver issues.

Solution

To solve the problem discussed above, you need to try these methods:

• You should run system diagnostics to determine the exact root of the problem. You may not come to a definite conclusion if the corruption occurs rarely or occurs while heavy load conditions. If the hardware issues come out as problematic, you should consider replacing them.

• You can upgrade the disk firmware and controller BIOS to the latest versions available.

• To repair the corrupted database, you need to run eseutil repair utility. Try to avoid performing hard recovery as this will delete the corrupted pages from database. Instead, you should restore the database from backup if available and is valid.

If all the attempts fail, you need a suitable third-party solution for EDB Repair. These are perfect EDB Repair Software built with safe scanning technology to repair and restore a damaged Exchange database.

Stellar Phoenix Mailbox Exchange Recovery is a powerful and secure tool to perform systematic repair of damaged Exchange databases created with Exchange Server 5.5, 2000 and 2003. It is a comprehensive EDB Repair tool that extracts all user mailboxes by converting them into individual Outlook usable .pst files. The tool can recover all email messages, notes, journals, tasks and other objects.

n Exchange Server database can get corrupt for several reasons, which include unexpected power failure, corrupted log files, network errors, virus infection and others. Consequently, the database may stop and fail to mount. You can try repairing the database using eseuitl utility. If this fails too, it compels you to apply the latest backup available or repair the database by an EDB Repair product.

For instance, you might come across the below error when dealing with Microsoft Exchange Server:

“Database page read failed verification because of no page data.”

It further suggests to move the existing databases to a new hardware. The error is logged with event 476 in application event log.

Cause

The above error means that the database read operation has failed It generally occurs with error 1019. The causes are:

1. The specific database page that has been referenced within the database file is expected to be in use, but Exchange finds it empty or uninitialized.
2. A page may fail its checksum test with error -1018. But if the page number field that is in use is 0×00000000, the checksum failed page will show -1019 error instead.
3. File is corrupt and as a result, it maps some pages into database file that are not associated with it
4. Logical links or pointers between database pages are not correct

The event 476 can also be related to -1018 error that indicates checksum mismatch and is caused generally due to hardware issues.

Solution:

You should check your system for related hardware issues if the database corruption problem is persistent. Replace the hardware and upgrade your firmware and/or disk controller if required.

To repair the corrupted database, you can run eseutil /p command, which is a hard recovery option in Exchange database. Later, you need to execute eseutil /d and isinteg -fix commands. Exchange hard recovery performs page-level recovery and deletes the pages that it finds corrupted. So, it is recommended that you use safe EDB Repair Software. These third-party utilities let you perform easy and secure EDB Repair without any changes to database content, structure and metadata.

Stellar Phoenix Mailbox Exchange Recovery is a reliable and advanced recovery tool for repairing corrupted Exchange databases. It repairs and restore individual mailboxes in .pst files. The comprehensive EDB Repair Software supports Exchange Server 5.5, 2000 and 2003. The tool restores all emails and other objects from corrupted database.

An Exchange Server database can get corrupt for several reasons, which include unexpected power failure, corrupted log files, network errors, virus infection and others. Consequently, the database may stop and fail to mount. You can try repairing the database using eseuitl utility. If this fails too, it compels you to apply the latest backup available or repair the database by an EDB Repair product.

For instance, you might come across the below error when dealing with Microsoft Exchange Server:

“Database page read failed verification because of no page data.”

It further suggests to move the existing databases to a new hardware. The error is logged with event 476 in application event log.

Cause

The above error means that the database read operation has failed It generally occurs with error 1019. The causes are:

1. The specific database page that has been referenced within the database file is expected to be in use, but Exchange finds it empty or uninitialized.
2. A page may fail its checksum test with error -1018. But if the page number field that is in use is 0×00000000, the checksum failed page will show -1019 error instead.
3. File is corrupt and as a result, it maps some pages into database file that are not associated with it
4. Logical links or pointers between database pages are not correct

The event 476 can also be related to -1018 error that indicates checksum mismatch and is caused generally due to hardware issues.

Solution:

You should check your system for related hardware issues if the database corruption problem is persistent. Replace the hardware and upgrade your firmware and/or disk controller if required.

To repair the corrupted database, you can run eseutil /p command, which is a hard recovery option in Exchange database. Later, you need to execute eseutil /d and isinteg -fix commands. Exchange hard recovery performs page-level recovery and deletes the pages that it finds corrupted. So, it is recommended that you use safe EDB Repair Software. These third-party utilities let you perform easy and secure EDB Repair without any changes to database content, structure and metadata.

Stellar Phoenix Mailbox Exchange Recovery is a reliable and advanced recovery tool for repairing corrupted Exchange databases. It repairs and restore individual mailboxes in .pst files. The comprehensive EDB Repair Software supports Exchange Server 5.5, 2000 and 2003. The tool restores all emails and other objects from corrupted database.

The core repository of data for Exchange Server is its Information Store service, which is consisted of both public folder and mailbox store data. The store service basically implements the Exchange Server store. If Microsoft Exchange Information Store Service (MSExchangeIS) does not start, one of the top reasons is that its database(s) are corrupted. Among other reasons, this behavior primarily occurs as an after-effect of abnormal shutdown of Information Store. At this point, you should perform soft recovery or restore the database from a previous online backup. If this doesn’t work, it is suggested to use EDB Repair tools instead of hard recovery as it can cause data loss.

To exemplify such MSExchangeIS scenarios, consider you try to start the Information Store service in your Exchange Server, but fail to do so. When you view the Event Log with MSExchangeIS as the source, you find events 1120 and 5000 recorded as the failure entries. These errors show that the Exchange databases are in inconsistent state.

Cause

These errors occur when the following conditions are true:

1. You perform Eseutil.exe hard recovery operation for Priv.edb file to fix its inconsistency errors that occurred due to unexpected shutdown of Information Store.

2. The earlier transaction log files don’t exit and are deleted

3. No hard recovery is performed for Pub.edb file

As a result of the above sequence of steps, Priv.edb is consistent, but Pub.edb is still inconsistent due to the absence of transaction log files.

Solution

To solve the described issue, you can use any of the below methods:

1. Remove the Pub.edb file provided it contains no required data. Make sure you don’t delete Edb.log file that is required by Priv.edb

2. Execute hard recovery for Pub.edb file using eseutil /p command

3. Use a third-party EDB Repair Tool to repair it

EDB Repair software provide safe recovery for corrupted or damaged Exchange .edb files. These are feature-rich applications built with advanced technology for database repair. Moreover, you can use these tools without any prior technical skills as they provide an interactive user interface.

Stellar Phoenix Mailbox Exchange Recovery is an advanced and safe Repair EDB utility that employs powerful scanning algorithms to repair a damaged Exchange Server database. It is compatible with Exchange Server 5.5, 2000 and 2003. It is a safe EDB Repair utility with impressive set of features. The tool extracts user mailboxes in individual .pst file format files.