How to Recover Exchange Database Without Log Files? Complete Solution
Summary: Transactions log files play a vital role in Microsoft Exchange Server. It manages all the records that exist in the Exchange database. When any user does any modification like – inserting, updating, deleting, etc… These changes first written in the Exchange log files before added to the MS Exchange database. In case of log file missing user is unable to recover EDB. Here in this write-up, we will guide users to recover Exchange database without log files in a simplified way.
Many IT organizations and industry verticals use Microsoft Exchange Server for communication and business purposes. In MS Exchange all the emails, notes, journals, calendars, contacts, etc… are stored in the Exchange database mailboxes. Therefore, to keep this data safe and secure from any disaster, threats, or any catastrophe.
It is the duty of the Exchange/IT administrator to backup the Exchange EDB and Log file. If any problem occurs in the future which results in the loss of data from the Exchange database which is permanent. In that case, the backup of the EDB file and Transaction log file comes handy.
But if any log files are missing or corrupted, which is not committed to the database, will create problem like – failed to mount database in Exchange 2016/2013. In this case, user can recover Exchange database without log files via ESEUTIL and Exchange EDB File Repair Tool provided by SysTools. This advanced software easily repair EDB file from corruption, extract mailbox from EDB file Exchange 2016 & lower version and export it to the Live Exchange Server, Office 365, and multiple file format in a hassle freeway.
Importance Exchange Transaction Log Files to Recover Exchange Database
Any modification is done in Exchange database such as: insertion, deletion, updation, etc… First, these changes write in the log file then it is added in the Microsoft Exchange database. Every transaction is logged in the Exchange log file because if any damage occurs in the Exchange database, then we can use the rollback the previous transaction and keep the database in a working state.
In case of any failure, the log files are very important. The MS Exchange recover and backup are completely depend on this file. However, it will become for users to recover Exchange database without log files. The Database Administrator copy the log file from one hard disk to other, in case of emergency the main files of database can be affected but not the transaction log file.
It is mandatory to keep the log file safe because it prevents Exchange database from being corrupt.
How to Replay Exchange Transaction Log Files?
There are only two ways that the Microsoft Exchange Server database is not in running mode i.e. Clean and Dirty Shutdown. Depending on these state the Exchange database is in Consistent or Inconsistent.
1. Consistent Database
When every transaction in the log files are committed to the database before it shutdown properly. According to this the database removes itself from log files, then the database is in clean shutdown state.
2. Inconsistent Database
If the log files are waiting to committed in the database but server shutdown accidentally due to power failure, hardware issue, or any other reason. In this case the database is not detached from the transaction log files, then this will be called as Exchange dirty shutdown state.
To check the state of the database, you can use the ESEUTIL utility. Follow the cmdlet given below:
Solution to Recover Exchange Database Without Log Files
Users have to perform soft recovery and hard recovery in Exchange database when it is not in a clean state. Use ESEUTIL tool to recover Exchange 2016/2013/2010/2007 database without log files. It is necessary that all transaction log files should be in a healthy state.
Log files affects the recovery process in two ways:
- Replay process will fail when log file are missing
- The recovery process abort with error
Some errors are given below:
Note: In case something went wrong during recovery process by using ESEUTIL tool, it is necessary to create the backup of database.
If the log files are missing, then you can use the eseutil /p cmdlet to bring the database in consistent state and for hard repair.
Follow the cmdlet given below to recover Exchange database without log files:
Note: By using this command to create the database in consistent state might result in data loss if the software find any page corrupt, broken link between tables, etc.. To overcome this situation, user should have to follow the B-tree structure but it is very complicated prolonged task if you are using ESEUTIL tool.
An alternative solution to repair Exchange mailbox and EDB file from major & minor corruption without losing any data, one can for the SysTools Exchange EDB file repair tool. It easily recovers corrupt & permanently Exchange database mailboxes and data items. The software exports the healthy and recovered mailboxes to the Live Exchange Server, O365, and MBOX, MSG, PST, PDF, HTML, EML file formats.
Bringing It All Together
Now you have complete information to recover Exchange database without log files by using the ESEUTIL tool. Using this utility users have to accept the data loss in recovery process. So, in order to recover minimal and highly corrupted Exchange database with no loss of data in a hassle freeway, you can use the advanced software provided in the above section and save the recovered Exchange data to Exchange Server.