MS Exchange Repair Tool to repair corrupted or damaged edb file

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.

Backup is the important and easiest prevention step to safeguard your data on Exchange Server. In case of any mishap, you can easily restore your data from recent backup. But in some situations, while backing up your data, you might come across a number of error messages and the backup process fails. This behavior generally occurs due to corruption to the database and it renders all of your critical emails, notes, contacts and other data inaccessible. It results into data loss and require Exchange Repair to be sorted out.

In a practical scenario, when you try to backup Exchange Server 2003 database, the following error occurs:

“WARNING: Portions of cannot be read. The backed up
data is corrupt or incomplete.”

At the same time, a number of Events are logged into Exchange Server Application Event Log that may sound like the following one:

Event Type: Error
Event Source: ESE
Event Category: Logging/Recovery
Event ID: 478
Date: 14/09/2005
Time: 6:48:56 AM
User: N/A
Computer: MAIL
Description:
Information Store (2692) The streaming page read from the file “C:\Program
Files\Exchsrvr\mdbdata\priv1.stm” at offset 1245716480 (0×000000004a402000)
for 4096 (0×00001000) bytes failed verification due to a page checksum
mismatch. The expected checksum was 2777780870 (0xa5919286) and the actual
checksum was 2814150562 (0xa7bc87a2). The read operation will fail with
error -613 (0xfffffd9b). If this condition persists then please restore the
database from a previous backup.

Root of the issue

You may come across this behavior of Exchange Server due to any of the following reasons:

1. The Exchange Server Database (EDB) is corrupted and it can not be read

2. The STM (Streaming Internet Content File) is damaged

In both of these situations, the Exchange Server database can not be accessed and you need to go for Exchange Recovery by working around this problem.

Resolution

You can sort out this problem by repairing and restoring corrupted EDB file. It is best possible with the help of effective third party tools, known as Exchange Repair software. These programs are capable of thoroughly scanning damaged EDB file and extracting all of its mailboxes and their objects such as emails, contacts, notes, tasks, journal, calendar, personal folders and more.

Exchange Repair applications have self-descriptive and interactive graphical user interface that let you carry out easy and quick recovery without demanding sound and prior technical knowledge. Due to read-only and non-destructive demeanor, they do not change original contents of the database.

Stellar Phoenix Mailbox Exchange Repair is the most advanced tool for MS Exchange Repair and restores EDB files created using Exchange Server 2003, 2000 and 5.5. This Exchange server repair software is designed for Microsoft Windows 2003, XP and 2000. It also recovers email addresses from Active Directory Store.

Error 4294967041, when you are hoping to start the Information Store service in Exchange Server implies that something creepy thing has got attached with. The service may stop responding at all and on top of that, an inquiry about the lying databases through eseutil/mh command may give you shocking news of EDB inconsistencies.

At this stage, attempting EDB recovery via eseutil /r command will again push you in a real dump when the following error message will prompt:

“-255 : JET_errDatabaseBufferDependenciesCorrupted”

Let’s come to know the reasons. Well, the topmost reason playing behind this corruption scenario is the unexpected shutdown of the Exchange Server system, more likely due to power outage.

Actually, before the shutdown if the three step process, which the ESE (Extensible Storage Engine) performs to commit the transactions to the Information store database, is not completed the error message may be seen. This particularly happens because the links to the data, stored in the memory buffers may get lost and thus the buffer dependencies get corrupted.

The first helping tool can be database backup, if exists or else EDB repair would do. Though using the inbuilt power of Exchange Server through Eseutil utility can do, but keep in mind that data loss can result as this will delete the corrupted information from the database, instead of actually correcting it. If you can resist this, then try out Eseutil for your private information store (Priv.edb) and public information store (Pub.edb).

For this use eseutil/r first and if it doesn’t succeed then use eseutil/p for hard repair. The use of esutil/d for defragmentation and isinteg-fix for correcting the logical schema errors is also necessary, without that Exchange Server recovery would not be fruitful.

On the other hand, for having complete Exchange Server repair, make use of third party applications which through the safe and effective scanning algorithms don’t harm any of the database content. These EDB repair utilities are the real applications to have the complete database, free from corruption.

EDB recovery software have the interactive interface, safe procedure and the ability to work effectively. These Exchanger repair software would never let you fall in any of the corruption instance.

Stellar Phoenix Mailbox Exchange Recovery is the ultimate answer for having EDB repair. This product works effectively for extracting all the mailboxes and granting Exchange Server repair for all the objects like e-mails, notes, journals, tasks and others. This Exchange Server recovery software will give you the repaired mailboxes in PST file format.

Exchange Server databases have two basic files, EDB and STM. As its supports transaction logging, uncommitted set of transactions are stored in log files. Users’ mail boxes are stored in EDB files. So when Exchange Server database corrupts, EDB Recovery is basically focused for extracting user mailboxes from EDB files. However, one of the symptoms that Exchange database is corrupt is that it will fail to mount. In addition, it will mark an event in application log like:

Event Type: Error
Event Source: ESE
Event Category: General
Event ID: 486
Description: Information Store (3932) First Storage Group: An attempt to move the file “E:\Program Files\Exchsrvr\mdbdata\E00.log” to “E:\Program Files\Exchsrvr\mdbdata\E000080A.log” failed with system error 2 (0×00000002): “The system cannot find the file specified.” The move file operation will fail with error -1811 (0xfffff8ed).

Also, an error message is encountered about internal processing errors. Other than Exchange database corruption, above log may also create while these issues:

• Application log may record this event due to un-removed log files after running eseutil/p repair command on damaged Exchange database
• It may also occur if log file has been deleted by antivirus program. Also if log file is quarantined by such programs, database may fail to mount
• Incorrect usage of eseutil /r three-character logfile base name command may also create the same issue. It particularly happens if logfile base name is incorrectly specified

Solution

• If un-removed log files are the issue after using esuetil/p command, we need to first check database consistency. If it is correct, we can move these log files to some other folder. However if database is reported as damaged, we can try committing all log files to the database. If problem persists, users are required to apply Exchange Server Repair solutions.
• Antivirus program is not recommended to scan Exchange Server directories. So it should be excluded from file level scanning. This can even corrupt the database.
• We need to correctly use eseutil /r command and logfile base name.

Exchange Server Recovery
Third party Exchange Server Repair solutions are applicable if user has no valid backup. Exchange Repair Software can scan damaged Exchange database and extract all user mailboxes.

In Exchange Server database, rollback is an important operation that is useful in removing all the changes. But if you are not doing rollback in proper way then it might be possible that edb file get damage and to recover edb file you need Exchange Server Repair to be performed.

The corruption might cause the Microsoft Exchange Server Information Store Service to stop unexpectedly and shows access violation error messages. If correct Windows NT and Exchange Server debug symbols are installed, then you find some dump entries in the Application Event Log of Exchange Server:

“FramePtr RetAddr Param1 Param2 Param3 Function Name
3f9ceb48 6feaf887 3f9ceb58 133f48b0 00000000 ESE!ErrNDSeek+0xb({…})
3f9ceb6c 6feb0010 10816f40 fffffed4 3f9cebf4 ESE!BTISeekSeparatorKey+0×48
3f9ceb80 6feaf954 3f9cebf4 00000201 10816f40 ESE!ErrBTISelectSplit+0xba
3f9cebc4 6fea45a8 00000001 00000000 10816180 ESE!ErrBTISplit+0xbd
3f9cec84 6fea4fe9 3f9ced34 00000001 00000000 ESE!ErrBTInsert+0×3e8({…}, {…})
3f9ceca0 6feb653e 3f9ced34 00000001 00000000 ESE!ErrDIRInsert+0×27({…}, {…})
10816180 04560e80 1081de80 0fdabad0 1081de80 ESE!ErrRECSeparateLV+0×1c6”

After this behavior, you are not able to access all your important or valuable data. But if you really want to get back all your data, then you have to do Exchange Server Repair to sort out this problem.

When the basic Exchange Server database engine attempts to rollback a creation of the LV (Long Value) tree on database table that is opened with exclusive access, Exchange Server database gets corrupted.

To fix this problem, first you have to prevent this problem from occurring in future and the second one is to repair the corrupted database.

The repair software is the powerful applications that are capable of scanning and repairing corrupted exchange database. These software can recover or repair all your EDB objects such as emails, notes, contact, journal, calendar entries and so forth.

One of the best software is Stellar Phoenix Exchange Repair Software to repair your corrupted edb files. It will repair your edb files created by Exchange Server 2003, 2000, 5.5. This software is very easy to use and also it’s very user friendly. In this software you don’t need any type of technical knowledge. To ensure efficient extraction of your data, selecting powerful and advanced Exchange Server utility software is essential. Exchange Server Repair software is compatible with Windows 2000, 2003 and XP.

Get this Stellar Phoenix Exchange Server Repair software and repair your exchange server.

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Stellar Data Recovery , a leading provider of data recovery software and service, today announced the immediate update for its popular Exchange Server recovery software- Stellar Phoenix Mailbox Exchange Recovery. With the capability to quickly and easily repair and restore all EDB objects, this software is helpful for the affected users.

The new version of Phoenix EDB recovery can also be installed and used on 64-bit computer as well as 32-bit. It is the best method for EDB recovery, helping to reduce downtime and cost of lost productivity.

The new file version has an interactive user interface and performs smooth EDB recovery without demanding any prior and sound technical knowledge. This EDB repair software has a set of powerful features which include:

• Can be used with both 32-bit and 64-bit computers

• Recovers email addresses from Active Directory storage

• Stores recovered file in PST format

• Compatible with Windows 2000 / XP / 2003

• Recovers notes, contacts, tasks and appointments

• Supports Microsoft Exchange Server 5.5, 2000 and 2003

For in-depth knowledge of the product, please visit http://www.ms-exchange-server-recovery.com/ . You can download and use free demo version of this EDB recovery software from Stellar’s website.

About Stellar Data Recovery

Stellar offers technology-driven data recovery software and service to help users recover their precious data. Stellar’s data recovery, email recovery, file recovery software are available for all system and application software. With more than 15 years of wealthy experience, company has over 1,000,000 satisfied customers all across the globe.