MS Exchange Repair Tool to repair corrupted or damaged edb file

Information Store is one ost vital components of Microsoft Exchange Server that stores transaction logs and database files. Unlike any other database corruption, Information Store databases can also get corrupted due to dirty database shutdown, anti-virus scanning, and log file corruption. In most of these situations, you encounter an error message that suggests database corruption. To easily overcome such database corruption scenarios, you need to restore the data from an online backup. But in case of online backup unavailability, you will need to opt for advanced Exchange Server Repair solutions.

To illustrate the above case, consider a scenario where you attempt to take a backup from Veritas software and you encounter the below error message:

“Access Denied to Database Mailbox Store (Server Name) – Warning mailbox Store (Server Name) is a corrupt file. This file cannot verify”

After the above error message pops up, the database backup process stops. On viewing the application error log, you view event id 217. The description section for the same event is mentioned underneath:

“Information Store (2320) 8d59bacd-96a8-4d3a-b1cd-0f31dc7be0b8: Error (-613)
during backup of a database (file D:\ProgramFiles\Exchsrvr\mdbdata\priv1.stm). The database will be unable to restore. Information Store (3272) The streaming page read from the file “D:\ProgramFiles\Exchsrvr\mdbdata\priv1.stm” at offset 5598494720 (0×000000014db24000) for 4096 (0×00001000) bytes failed verification due to a page checksum mismatch. The expected checksum was 3969232578 (0xec95aec2) and the actual checksum was 4119053255 (0xf583c3c7). The read operation will fail with error -613 (0xfffffd9b). If this condition persists then please restore the database from a previous backup.”

Cause:

The fundamental cause for the above error message is corruption of database.

Resolution:

To resolve the above error message, you need to:

1. Restore the data from an updated backup, as suggested in the error log.

2. Run Eseutil/d (offline defragmentation) to resolve minor corruptions in Microsoft Exchange database.

3. Run Eseutil /p and then run Isinteg -fix to fix corruption on a database backup.

However, if the problem still persists, then you need to go for an advanced Exchange Repair to extract user mailboxes from the corrupted database. Such Exchange Server Repair solutions can be easily downloaded from the Internet and used even by a novice user.

Stellar Phoenix Mailbox Exchange Recovery is a advanced repair application that repairs corrupt Exchange EDB file, irrespective of its cause of corruption. The repaired mailboxes can be saved in separate *.pst files. With recovery of deleted mailboxes, the Exchange Repair software supports Exchange Server 5.5, 2000, 2003, and 2007.

Exchange Information Store service is the most critical component, without which the server is of no use. The Information Store is comprised of different storage groups and if these groups go corrupted, it results into data inaccessibility. Further, the Information Store service also stops. In critical situations, when you cannot restore from the backup or repair it using standard utilities, an Exchange Server Repair tool is required to be used.

For example, when using Exchange Server, you might observe one or more of the following symptoms:

• You attempt to start Information Store service, but cannot do so with the following error:

“Windows could not start the microsoft exchange information store on local computer.”

• When you try to start the Exchange event service, this also fails and the following error occurs:

“Could not start the microsoft exchange event service on local computer.
Error 1068:The dependency service or group failed to start.”

• On viewing the event viewer, you see event IDs 7001 and/or 7024 logging that suggest that Information Store service has failed to start or has terminated

Cause

The general reasons of Information Store not starting are:

• Permission issues related to file system, registry etc.

• The message store or log files could not find the required disk space

• Corrupt message store

Event 7024 generally occurs when the Exchange computer account doesn’t has sufficient rights to access the Information Store. This can also occur if Exchange Enterprise Servers group that root from the parent domain doesn’t consist the required Exchange Domain Servers group from child domain.

Solution

In order to solve the above problem, you need solutions such as:

• Check for sufficient permissions required to access the file system, registry and other components

• Check for required disk space for log files and message store

• Run setup.exe /domainprep for Information Store permission related issues

• Add the required group to the Exchange Enterprise Servers group in the parent domain

• Repair the corrupted message store using eseutil /r and/or eseutil /p command or restore from backup

Backup is the safest option to restore the database as the eseutil utilities can cause irrecoverable data loss. However, if backup is absent, you are suggested to use an Exchange Repair utility. The EDB Repair tools use powerful and safe scanning algorithms to repair and restore the corrupted Exchange database.

Exchange Repair Software is an advanced and safe tool that repairs Exchange databases and extracts the mailboxes as *.pst files. The Exchange Repair tool supports Exchange Server 5.5, 2000, 2003, and 2007. The software is applicable in each instance of database corruption and provides an interactive design and look .

The main repository of mailbox data in Exchange Server is the .edb file that is primarily composed of b-trees. Since a b-tree is allowed to have a considerable depth, b-trees deploy indexes to permit quick data access. In Exchange EDB, there are few ancillary trees that hold table indexes to work with the main tree. If these indexes go corrupted, the entire table and sometimes, the whole database become unusable. This is what we refer as logical database corruption. In critical situations, when this type of corruption is not limited to index page corruption, you need to implement Exchange Server Repair solutions.

To understand such potential problems with Exchange database further, consider the discussed scenario and error. When using Exchange Server 2007, you can encounter event 467 logging in the application log. Additionally, on viewing the description section of the same event, you receive an error that reads similar to below:

Information Store (number) Index [index name] of table [table name] is corrupted.

This error typically indicates a corrupted index in the Exchange store. As symptoms, you might observe access violations and repeated crashes. Also, this type of corruption might go undetected for long without any symptoms. Even the Exchange-aware backup may fail to detect this corruption. Event 467 suggests logical corruption at Database (JET database engine) level and is exhibited when JET engine touches this location in the database while reporting it as event 447. For specific root causes, one needs to view the application and system log cautiously as these errors can damage your data badly.

Solution

Following suggestions can help you isolate the depicted problem:

1. If corruption is limited to index leaf pages and not with the database pages, running Eseutil /d (offline defragmentation) alone can perform Exchange Server Repair.

2. In critical problems, you may need to use ExMerge utility to move the mailboxes to a new, blank Information Store.

3. The Exchange Server might be affected from page or database level corruption together with index page corruption. In such cases, you can execute Eseutil /p and then Isinteg -fix commands as Eseutil /d command may not work. You can further use ExMerge tool to put the database again in use.

4. To avoid data loss problems due to Eseutil /p utility, it is however, recommended to opt for a safe third-party Exchange Repair utility.

The Exchange Repair is a professional utility that repairs corrupted Exchange EDB file and restores the mailboxes in separate *.pst files. The Exchange Server Repair product is easy to use with its self-explanatory interface. Designed for Exchange Server 5.5, 2000, 2003, and 2007, the tool is also competent to recover deleted mailboxes.

When you perform operations like an online backup or defragmentation, the system reads each database page for writing or other processes. To do so, it first undergoes checksum test and check if it is correct. For any reason, if the page checksum mismatch with that has been calculated by database engine, it reports an error and the operation is halted. Such errors usually root from physical database corruption and compel you to restore the database from backup or apply some Exchange Repair measures to fix database corruption.

As an example of such problems, with Exchange Server 2007, you might exhibit the following symptoms:

1. The client computer cannot start Microsoft Outlook

2. Users fail to send/receive e-mails

3. Online backups and defragmentation fail with a -1018 checksum mismatch error

4. The application event log in Exchange Server reports an error as below:

“Database recovery and restore failed with an unexpected error.”

Cause

The above symptoms suggest that Exchange Server has failed to read database page due to checksum mismatch and the page is corrupt. However, the same issues can also occur due to firmware malfunction or problem in RAM. For the specific reason, you are suggested to view error code that is listed in the event description.

Solution

You need to apply these measures to solve the given problem:

1. If the error listed in event description is -515, the transaction log file(s) might be missing. Determine the missing logs and move them back to the log directory and/or restore the database from backup.

2. Check the system for hardware issues and solve them or migrate to a different hardware

3. Consider upgrading the BIOS and firmware

4. Perform Exchange Server Repair with eseutil /P command, followed by eseutil /D and isinteg -fix. Make sure you backup the database first as running this repair can cause important database pages to delete.

For safer MS Exchange Repair, consider using solutions like an Exchange Server recovery software. These commercial applications are built with advanced technology to run effective scan for a corrupted database and extract the valuable data out of it.

Exchange Repair Software is a professional utility that repairs corrupted Exchange Server databases. The Exchange Server Repair tool recovers all the mailboxes in individual *.pst files and also allows to select them as required. The tool supports Exchange Server 5.5, 2000, 2003, and 2007. The software can also recover deleted mailboxes.

For the reason that Microsoft Exchange Server mainly acts as a mailbox server, backing up the database regularly is the key to deal with disaster recovery needs. Microsoft recommends using an Exchange-aware backup utility such as Windows Server 2003 backup or any third-party application. These utilities require access of .pat file (discussed in ’cause’ section) and Exchange Server to be free from any hardware-related errors to successfully backup the database. At times, these hardware-related concerns also bring corruption to the database, which makes it obligatory either to restore from the last backup or perform Exchange Server Repair to repair EDB file of MS Exchange Server.

To apprehend such situations better, consider a scenario when you try to perform an Exchange-aware backup of the Exchange database. But due to some causes, the operation fails and you get an error message mentioned below:

“An error occurred during backup of an Exchange store database – the cause and resolution for the online backup failure depends on the error listed in the Description of the event.”

This error is generated by ESE (Extensible Storage Engine) and is associated with event ID 217. The error statement further mentions another error in its description section that actually determines the root cause of failure.

Cause

General reasons causing the above behavior to occur are:

• ESE cannot access the database .pat file exclusively. Exchange Server uses this file while backup is running to keep a record of updated pages, separately for both private and public stores. This is the patch file that ensures backing up of pages modified while backup is running.

• If the description section of error reports -1018 error, this might be because of some hardware-related issues.

• In case of description section mentioning -613 error, the cause could be checksum error in .stm (SLV) file. Another possibility is some hardware-related concerns.

Solution

You need to apply these measures to solve the described problem:

• Another program might be accessing the .pat file, so either stop the software or wait till it finishes.

• In case of -1018 error, find and solve the issue behind and restore the database from the last online backup if available. If you are using Enterprise edition, you can also use Exmerge. In other cases, you can perform EDB Repair using eseutil /p, followed by isinteg -fix commands, but the data loss is likely.

• Follow the same steps as for -1018 error in case of -613 error. You need to repair .stm file along with the associated .edb file.

Since eseutil /p causes database pages to delete, it is more suggested to opt for third-party Exchange Server Repair utilities.

MS Exchange Repair Software is an advanced and reliable tool that repairs Exchange databases and restores the mailboxes as *.pst file. The Exchange Repair tool supports MS Exchange Server 5.5, 2000, and 2003. The software is valid to use in each instance of database corruption with an interactive design and look .

A dirty shutdown in Microsoft Exchange Server generally leaves your Information Store in inconsistent state. This occurs when the Information Store(s) have not been closed properly, generally because of power outage or power surges. In most of such cases, you cannot mount the EDB databases. The dirty shutdown doesn’t always indicate the database corruption, but the fact that the database files have not been detached from the log files’ stream in a proper fashion. The automatic recovery procedure starts the next time when you start the Exchange Server. But if the procedure fails, you need to recover the database files manually. This can be done either by using Exchange Server built-in repair utilities or with the aid of Exchange Repair tools.

For example, consider a situation when you experience dirty shutdown with your Exchange Server. The next time when you start the server, it displays the following error:

“JET_errDatabaseCorruptedNoRepair -1224”

The database might be inaccessible.

Cause

The error indicates that the database is corrupted but for some reasons, repair is not allowed.

Solution

You can try implementing the following measures to solve the given problem:

1. Check if an online backup is available that can be used to restore the database.

2. If no backup is present, you can repair the database manually using eseutil tool as follows:

a) Run eseutil /mh command to check the database file header

b) If the above command reports ‘Dirty Shutdown’ state, make sure that all the present transaction log files from the checkpoint forward are present. If not, you can run eseutil /p, command to make the database consistent.

c) After this, you should run eseutil /d command to defragment the database. This discards and later rebuilds the indexes and space of the Exchange databases.

Running eseutil /p command can cause catastrophic data loss, so you are suggested to opt for safer database recovery solutions. There are several EDB Repair Software available that use effective and safe scanning algorithms to analyze and repair corrupted Exchange databases. The MS Exchange Repair applications are easy to install and use with no prior requirement of having any technical knowledge.

This Exchange Repair Software is a powerful and user-friendly tool that repairs corrupted Exchange Server databases and extracts the mailboxes in individual *.pst files. The Exchange Server Repair Software supports MS Exchange Server 5.5, 2000, and 2003. It is a feature-rich utility that is compatible with Windows 7, Vista, XP, 2003, and 2000.

Microsoft Exchange Server database engine splits a column into several parts, when it finds it too large and thus, the Long-values (LVs) are created. These structures are stored in a different B-Tree (binary tree) of the associated table, each with a unique long-value ID. Each of these LVs has a specific header, called LVROOT, consisting of information, like reference count and length of LV. In some cases, this LVROOT can get overwritten (usually because of a defective B-split operation), which eventually results into corruption of LV. This can cause Information Store to stop, errors accessing LV and/or database corruption. To repair the database, you should restore from a suitable backup. If no valid backup is present, you need to apply an Exchange Server Repair solution.

To illustrate such problems, suppose you attempt to perform offline defragmentation of an Exchange database. But the operation fails with an error message as below:

“Operation terminated with error -1526 (JET_errLVCorrupted, Corruption encountered in long-value tree) after <n> seconds”

Further, when you execute eseutil /g command to check the integrity of the database, it reports the database as corrupted.

Cause

The above error occurs due to corruption in LV tree. This can exist in conjunction with orphaned LVs.

Solution

You should first check for the backup. If present and valid, restore from it. In other case, you need to implement the given sequence of steps to solve this issue:

1. Run eseutil /g with /v and /x parameters for detailed output and examine it for the cause (error, orphaned or corrupted)
2. If the LVs are corrupted, you can run eseutil /p command. But make sure you backup the database first as this causes corrupted data to delete
3. If the LVs are corrupted and orphaned both, you should execute eseutil /d to perform database defragmentation after the repair.

Eseutil /p is a hard command. So, for safe EDB Repair, you need to use a third-party database repair tool. An MS Exchange Repair Software uses intensive, yet safe, scanning algorithms to repair and restore a corrupted Exchange database, while providing an interactive user interface.

Stellar Phoenix Mailbox Exchange Recovery is an effective solution that repairs a corrupted Exchange database and restores it to a user-specified location. The safe Exchange Repair solution extracts all user mailboxes as individual .pst files. The tool supports Exchange Server 5.5, 2000, and 2003. It is compatible with Windows 7, Vista, XP, 2003, and 2000.

Ost to Pst Recover Outlook

Exchange Server mailbox store is composed of user mailboxes and system mailboxes. Each mailbox store is made of two files : Priv.edb and Priv.stm. When a disaster occurs to any mailbox store, the EDB file is considered to be the most vital component of recovery, for the reason that it contains all email messages, headers and text attachments of users’ email messages. There are various Exchange Server Repair software available that can repair a corrupted Exchange database, in case when you don’t have any valid database backup to restore.

For instance, consider a scenario when you try to mount your Exchange Server mailbox store. The mount operation might fail logging the events 9175 and 455 in application event log.

Cause

There can several possible reasons that can cause the described issue:

1. An antivirus software is running that has deleted the Exchange log files

2. You have performed soft recovery for database using eseutil /r with incorrect logfile base name

3. Mailbox store is corrupted

Solution

To solve this issue, you need to try these fixes:

1. You should ensure that antivirus software doesn’t scan Exchange Server directories. It can even corrupt the database files. If the log files have been deleted, you should restore the database from backup and play through the log files. In case when no good backup is available, you need to run Exchange repair utilities for bringing the database to consistent state.

2. You need to perform soft recovery using correct log file base name, such as e00, e01, e02 or e03 .

3. If the entire mailbox store is corrupted, you should run Eseutil /r to repair it or restore from backup. However, you can also run Eseutil /p as hard recovery operation, but this causes the dirty pages to delete. So, it is recommended to use commercial Exchange Server Repair tools that can safely repair a corrupted Exchange database.

Exchange Repair software are powerful tools that use exclusive repair algorithms, while providing graphically rich user interface.

Stellar Phoenix Mailbox Exchange Recovery is a fully-featured and non-destructive tool to perform systematic repair of damaged Exchange databases created with Exchange Server 5.5, 2000 and 2003. It is a complete Exchange 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.

Microsoft Exchange Mailbox Merge tool or Exmerge.exe allows you to extract mailboxes’ data from an Exchange running computer and then merge it into same mailboxes stored on a different computer running Exchange Server. The tool copies the required data from the root server into .pst files and then merges it in the personal folders into mailboxes stored on the target server. At times, you cannot open the .pst files after using Exmerge.exe to extract the data to another Exchange Server database. This can occur due to incompatibility issues, new format of Outlook for PST, incorrect .pst file privileges or database corruption. As a result, the database becomes corrupt and you need Exchange Repair solution.

For example, when you try to run Exmerge.exe to move data from an Exchange Server computer to another, you may receive the below error for various users:

“Error configuring message service (MSPST MS) (MAPI_E_EXTENDED_ERROR) (CmapiSession::CreateEMSPSTProfile).

Error opening message store (MSEMS). Verify that the Microsoft Exchange Information Store service is running and that you have the correct permissions to log on. (0×8004011d).”

You cannot open the related .pst files.

Cause

The Exchange database is corrupted due to incomplete or improper merge operation. This can also occur due to insufficient .pst file permissions.

The database corruption can also result because of unexpected shutdown and virus issues.

Solution

You should make sure that you use the latest version of Exmerge utility and the .pst files are not marked as read-only. For removing the read-only attribute from .pst file, you need to click its Properties and clear the associated check box.

To restore the lost data for damaged database, you need to use your last backup. If this is absent or seems to be invalid, you need a third-party mailbox extraction tool. Termed as Exchange Repair software, these tools can repair and rebuild a corrupted Exchange database well while maintaining its integrity.

The Exchange Repair Software is highly competent to extract database mailboxes by using powerful scanning algorithms. Also, these tools are easy-to-use products with a graphically rich user interface.

Stellar Phoenix Mailbox Exchange Recovery is an advanced and non-destructive 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 comprehensive Exchange Server Repair solution with impressive set of features and options. The tool extracts user mailboxes in individual .pst file format files.

Microsoft Exchange Server 2003 SP2 offers new features, more reliability and easier administration over its earlier counterparts. SP2 is a cumulative update that improves the Exchange messaging environment by including improvements in mobile messaging, mailbox and protection against spam. Before you upgrade your servers to Exchange Server SP2, it is recommended that you make complete backup of system state, file system and most importantly, Exchange databases. This assures of data availability in case the installation goes wrong in any way. But cases occur when your Exchange databases get corrupt when no clean backup is present. In such situations, you should use a powerful Exchange Server Repair product that can use safe scanning algorithms to repair a corrupted Exchange database.

For instance, you can consider a scenario describes below:

1. You run Exchange Server 2003 SP1 or an earlier version
2. You decide to upgrade to Exchange Server 2003 SP2. During the installation of SP2, the setup failed to stop ExIFS (Exchange Installable File System) service but continues with no notice
3. After this, when you try to mount Information Store, it fails and events 470, 9519, 9518 and 104 are logged in the application log.

Cause

The above symtoms suggest that Exchange database may have got corrupted due to installation of SP2. It can also occur if an antivirus software is scanning the Exchange databases.

Solution

Before making any database restoration attempts, you should make sure that Exchange databases are excluded from any antivirus scanning. If databases appear as corrupted, you should consider these suggestions:

1. Try repairing the corrupted database by running eseutil /r command
2. If it fails, restore the database from the last backup you have
3. When no clean backup is available, you should use a Exchange Repair software.

Exchange Server Repair products are highly competent utilities with powerful scanning algorithms to repair a corrupted Exchange database. These software are infallible solutions to any issue of database inconsistencies. Equipped with graphically rich interface and options, such software provide guide you through easy to implement procedure of repairing the database.

Stellar Phoenix Mailbox Exchange Recovery is an advanced and safe Exchange Repair 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 Exchange Server Repairutility with impressive set of features. The tool extracts user mailboxes in individual .pst file format files.

Circular logging is a Exchange Server feature that implements recycling of logs. Microsoft Exchange Server writes the data to be committed to the database in transaction logs before actually writing it. If circular logging is enabled and four logs have been filled, it assumes that the first log as committed and thus, recycles the logs in order to save disk space. But it comes with a major flaw that prevents disaster recovery. If the database is corrupted while the feature is enabled, Exchange can only restore as far as the last backup is available. In case a suitable backup is unavailable, you are suggested to opt for Exchange Repair solutions that are powerful and safe too at repairing a corrupted Exchange database.

For example, you observe an unexpected shutdown with an Exchange database. After this, when you try to start it, an ‘JET_errFileNotFound’ error is displayed with a numerical value, such as 4294965485, -1811 or 0xfffff8ed. When you view the application event log, it shows events 1120 and 5000.

Cause

Events 1120 and 5000 generally show database inconsistency that prevent the database to start. You should see their description for the exact reason.

One probable cause could be that circular logging is enabled and error lies in checkpoint file, usually Edb.chk file. Since the circular logging is enabled, Exchange deletes the log files immediately after writing the data to the database, for which the information is traced out by Edb.chk file. Now, if a process blocks the Edb.chk file for a considerable period of time and prevents Exchange to update it, the file may get deleted before it could be updated. Thus, the checkpoint gets lost if the database suffers an unexpected stop. When you restart the server, the Edb.chk file points to a log file that doesn’t exit anymore and hence, the database doesn’t start.

Solution

If the exact cause is known and the errors are occurring only because of Edb.chk file, delete it and database service. But if the cause is different, the database might get damaged.

To achieve recovery, you should not use eseutil /r command without /is or /ds switches. This is because at this point, a new Edb.log file can get created and Exchange may try to repair using incorrect set of log files. Though you can delete the Edb.chk file, but the database remains corrupted.

For getting successful results from a corrupted Exchange database, it is suggested to use Exchange Recovery products in case if no good backup is there. Exchange Server Repair tools are high-end and safe database repair utilities that can repair and restore a corrupted Exchange database.

Stellar Phoenix Mailbox Exchange Recovery is a fully-competent tool to perform systematic database repair of damaged Exchange files created with Exchange Server 5.5, 2000 and 2003. It is a reliable Exchange Server 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.

An Exchange Server Information Store might get corrupted due to several errors, including unexpected shutdown and network errors. Corruption might involve any database files, called .edb files, that reside in Exchsrvr\Mdbdata folder. While Information Store corruption, you might observe server behaving slowly, Information Store Service not starting or not stopping, email delivery issues and several errors showing that the database is inconsistent. You should use your backup to restore such corrupted database or run ESEUTIL utility to repair it. However, if none of the solutions works, you should use Exchange Repair Software that could repair and restore a damaged Exchange database.

For an instance, consider that you run ESEUTIL /D utility to defragment your database and the process fails. When you view the Windows NT Application log of Event Viewer, you come across the below error message:

“Operation terminated with error -327 (JET_errBadPageLink, Database corrupted) after <n> seconds.”

Additionally, you might also observe Exchange Server being slow or unresponsive while normal database operations.

Cause

Exchange Server ‘Bad Page Link’ errors generally indicate logical database corruption. If the internal database structure is not correct because of corrupted or misaligned pointers, you might receive such errors.

Solution

You should apply these measures to isolate the given problem:

• If available, use online backup to restore the damaged Exchange Server database

• Use Administrator tool ‘Move Mailbox’ in order to move users’ mailboxes from the affected Exchange Server to a healthy one

• Run ESEUTIL /P against the database while making sure that the database store is not mounted. Next, execute ESEUTIL /K to check the database for consistency

• If the problem persists, use a powerful Exchange Database Repair tool to efficiently repair the damaged database

Exchange Repair Tools are safe and comprehensive repair applications that can safely repair a logically crashed Exchange database. These tools employ high-end algorithms to examine the database and restore it at a safe location. The software provide you self-descriptive interface and hence you can use the tools without any prior technical understanding. Embedded with advanced options, the software serve as most suitable tools to repair the damaged database.

Stellar Phoenix Mailbox Exchange Recovery is a fully-competent Exchange Repair tool to systematically repair damaged Exchange databases created with Exchange Server 5.5, 2000 and 2003. It provides safe EDB Repair and extracts all user mailboxes by converting them into Outlook usable .pst files. The tool is capable of recovering all email messages, notes, journals, tasks and other objects.

An Exchange Server database might fail to mount if it is inconsistent. In such cases, you can use Exchange utilities to repair them. However, if it fails to perform the repair, you need to use your backup or scan the database using an efficient Exchange Repair software.

For an instance, consider that you try mount a Microsoft Exchange Server database, but it fails and an error message displays with ID no. C1041724. When you view the application log, you come across the following event:

Event Type: Error
Event Source: ESE
Event Category: Logging/Recovery
Event ID: 413
Description: Information Store (3932) First Storage Group: Unable to create a new logfile because the database cannot write to the log drive. The drive may be read-only, out of disk space, misconfigured, or corrupted. Error -1811.

Cause

There can be several reasons for this error to occur:

• The Exchange log file has been deleted or quarantined by an antivirus application

• You run eseutil /p command on the database, but the log file doesn’t get removed

• Exchange log file has a mismatching LGeneration and signature

• You run eseutil /r command with incorrect logfile base name

Solution

Corresponding solutions to the given problem are as below:

• If the Exchange log file has been deleted, you need to use your Storage Group database backup to restore and replay the log files. If restoring from backup is not feasible, you should repair it using database repair utilities or a third-party application to make the database back to consistent state.

• If the Exchange log file has been quarantined, you should recover it to the folder containing your production log files and start Microsoft Exchange Information Store service.

• Move the transaction log files to a different folder if running eseutil /p command is the issue, while making sure that the databases are consistent. If the databases are inconsistent, restore them from backup or apply a third-party tool to repair them.

• Use the correct switch to run eseutil /r command successfully.

If the database is consistent and you cannot repair it using Exchange utilities or restore it from backup, you need to perform Exchange Server Repair using a powerful third-party tool. Exchange Repair Tool use high-end repair algorithms to repair and restore a damaged Exchange database in all cases.

Stellar Phoenix Mailbox Exchange Recovery is a reliable and advanced MS Exchange Repair tool that repairs and restores a damaged Exchange database. It supports Exchange Server 5.5, 2000 and 2003. It is a non-destructive Exchange Server Repair tool providing impressive features and options. The tools enables to restore all user mailboxes together with unchanged contents.

In Microsoft Exchange Server, public folders have great importance. It not only contains user data, but also contains critical system information, which is required for smooth operation of Exchange Server environment. For effective management and better performance of public folders, the replication process is carried out. There are two types of replication is possible- Hierarchy replication or Content replication. In some cases, replicating the public folders between Microsoft Exchange Server could sometimes be troublesome and thus cause several inconsistencies in the database and make it inaccessible. This behavior of MS Exchange Server might cause serious data loss situations, which require Exchange Server Repair using appropriate tools.

In a practical scenario, when a computer system that is running MS Exchange Server 2003 sends the public folder replication, email scanning might occur. You might also come across the corruption of MDB (Messaging Database) at the same time. At this point, you may receive the below given error message:

“Multiple edits have been made. The conflicting edits have been attached to the conflict message.”

At this point, the Exchange Server public folders might become inconsistent and inaccessible. It causes critical database corruption and data loss circumstances. You need to find out that cause of this issue and go for Exchange Repair to sort out this problem.

Root of the problem

This issue might take place when a database transaction is inappropriately written due to an error, which causes an unbalanced Exchange Server transaction state. The unbalanced state of transaction allows virus scanning to be carried out on the outbound replication emails if the virus scanning is enabled. Transaction’s unbalanced state might also result into the database corruption.

Resolution

In order to come across these situations, Microsoft has provided a hot fix that can be downloaded from Microsoft’s website. You should always check the database integrity after installing the hot fix using Isinteg.exe utility. This solution can sort out this problem and it will not occur in future, but it can not repair the damaged database. In order to repair and restore corrupted database, Exchange Recovery is required.

This is potential through powerful and advanced third party applications, known as Exchange Repair tools. These software carry out extensive scan of corrupted Exchange Server database and restore all of its objects intact. They come equipped with interactive and simple graphical user interface and thus do not demand sound and prior technical skills.

Stellar Phoenix Mailbox Exchange Recovery is the most effective and advanced MS Exchange Repair tool to ensure successful recovery in most of the database corruption scenarios. It repairs EDB file of Exchange Server 2003, 2000 and 5.5. This software is compatible with Windows 2003, XP and 2000.

Microsoft Exchange Server users transaction-based and fault-tolerant database for storing emails and directory information before this is applied to database. When a power failure or any other abnormal server failure takes place, the Exchange Server uses transaction log files for reconstructing data, which is already taken by Exchange Server but not yet written to database. But in some situations, the database failure might become very critical and can not be resolved in normal ways. At this point, your valuable data become inaccessible and data loss situations occur that lead you to Exchange Repair.

Exchange Server Database (EDB) Components

The EDB file is made up of server components, based on the standard database technique. Entire system bank on an embedded database engine, which lays out structure of disk of the Exchange Server and organizes memory. Major components of EDB file are as give below:

a) Information Store: This is the key component of Exchange Server. It has two separate database: private information store and public information store. It works with MAPI (Messaging Application Programming Interface) and database engine to make sure that all operations are stored on server hard drive.

b) JET Database Engine: Exchange databases are based upon JET format that uses log files to maintain and track information. It is a 32-bit multi-threaded database engine, which combines performance and speed with other powerful features for improving transaction-based processing abilities.

Exchange Server Database Corruption

Like other database, EDB might also experience corruption at some point, which needs the system to try to get back to consistent state. The corruption could occur due to virus infection, improper system shutdown, application malfunction, user errors and missing database objects. There are two main types of database corruption, which require Exchange Server Repair to be resolved:

(i) Logical Corruption: It occurs due to damaged or missing database objects such as database engine failure and Information Store corruption. This type of corruption could also occur at application level in folders, mailboxes, messages and attachments.

(ii) Physical Corruption: This type of corruption occurs when entire database gets damaged on the hard drive. It is very easy to identify.

In order to overcome the corruption situations, Exchange Server provides two repair tools- Eseutil and Isinteg. These utilities allow you to carry out Exchange Server Recovery by repairing and restoring corrupt database in some situations, but these programs does not work in case of severe database damage.

In such circumstances, Exchange Server Repair applications come for your help to scan the damaged database thoroughly and extract all of the mailboxes and data from it. These tools are quite easy and safe to use.

Stellar Phoenix Mailbox Exchange Recovery is the most advanced and powerful Exchange Repair application to ensure absolute recovery of your inaccessible data from EDB file of Exchange Server 2003, 2000 and 5.5. This software is designed for Microsoft Windows 2003, XP and 2000.