Exchange Server is one among the foremost widely used mail also as a calendaring server. This popular messaging platform offers scheduling, emails, and tools for both messaging service and custom collaboration applications. With hands on this renowned application, a user can manage also as create all communication effortlessly, be it in on the mobile device or at the workplace.<\/p>\n\n\n\n
In the Exchange Server, one thing that plays an important role is Transaction Log Files. It manages the entire changes record that are made within the Exchange Server. All the knowledge i.e. to be inserted into mailbox database is first written within the Exchange Server database. If just in case , any detail is missing from the log file, it leads to an operation failure issue. And, as a result, a user cannot access mailbox database from EDB files. In short, log files are essential for correct functioning of the Exchange Database.<\/p>\n\n\n\n
Let\u2019s now check out how log files help in Exchange Database Recovery – <\/p>\n\n\n\n
How to Recover Exchange Database with Log Files<\/p>\n\n\n\n
Prior to executing the Exchange mailbox database recovery, a user must examine whether the state of the database is healthy or is during a dirty shutdown. To run this, the user must use the subsequent Eseutil\/mh command:
\nc:\\program files\\exchsrvr\\bin>eseutil\\mh \u201cdrive: \\program files\\exchsrvr\\mdbdata\\priv1.edb\u201d<\/p>\n\n\n\n
Two Approaches to Recover Exchange Database<\/p>\n\n\n\n
\u2022 Soft Recovery
\n\u2022 Hard Recovery<\/p>\n\n\n\n
Soft Recovery<\/p>\n\n\n\n
Soft Recovery is that the procedure of replaying the transaction log files during a scenario when the database is re-mounted on the server that’s affected by an unanticipated halt.
\nDuring this circumstance, the soft recovery process is auto-executed by the Exchange Server through the whole pending transaction log file just by reading the checkpoint file. If just in case , this auto process doesn’t work, Eseutil commands are getting used .<\/p>\n\n\n\n
ESEUTIL \/ r enn\/ L [path to log files] \/ s[ path to checkpoint file] \/d [ Path to database file]\/ i<\/p>\n\n\n\n
Here r stands for recovery mode, enn for log file name prefix, \/l specify path to log file, and \/d specify the trail to database file (it doesn’t includes the name of the file itself). <\/p>\n\n\n\n
Steps are as follows:<\/p>\n\n\n\n
\u2022 Execute Eseutil \/mh command.
\n\u2022 Now, check the health of the database
\n\u2022 If the state is clean shutdown, then from Transaction logs folder location, migrate all the log files and mount the stores; just in case it’s during a dirty shutdown state, ensure whether Logs required log files is out there or not.
\n\u2022 Next, check whether the specified log files are during a clean state or not. to verify this, execute Eseutil \/ml \u201cPath of the log files\\log prefix\u201d.
\n\u2022 Now, if log files are healthy, use Eseutil \/r \/l \u201cPath of the log files\u201d \/d \u201cPath of the database\u201d command and execute soft recovery\u2014 eseutil\/r.
\n\u2022 On successful completion of all the commands, mount the stores.<\/p>\n\n\n\n
If in case, a mistake is generated\u2014\u201cOperation terminated with error -1216 (JET_errAttachedDatabaseMismatch, an impressive database attachment has been detected at the beginning or end of recovery, but the database is missing or doesn’t match attachment info) after n seconds\u201d. Then just run soft recovery using \u201c\/i\u201d switch. This action will override the EDB-STM mismatch and resolve the error. \u00ac\u00ac<\/p>\n\n\n\n
Hard Recovery<\/p>\n\n\n\n
Hard Recovery procedure uses online backup to replay log files. If, in any circumstance, the \u201cLast Backup Set\u201d option is about on, then the recovery process are often executed automatically. during this recovery process, there’s no need of a checkpoint file as database recovery is performed using restore.env file. Adding more, within the scenario, when \u201cLast Backup Set\u201d option isn’t enabled, hard recovery is to be executed manually using Eseutil command.<\/p>\n\n\n\n
Syntax to execute Hard Recovery:<\/p>\n\n\n\n
C:\\Program Files\\ Exchsrvr\\bin.eseutil \/cc \u201c C:\\Temp\\First Storage Group \u201c_<\/p>\n\n\n\n
Here, C:\\Program Files\\ Exchsrvr\\bin.eseutil \/ indicated Eseutil installed location, C:\\Temp\\First Storage Group \u201c_ indicates restore.env folder location.<\/p>\n\n\n\n
Note: This recovery process will only work on the restored databases from the valid backup. No other Exchange server EDB files are often recovered using it.<\/p>\n\n\n\n
Steps are as follows:<\/p>\n\n\n\n
\u2022 attend C:\\Temp
\n\u2022 Check the log restore location
\n\u2022 Now, open the folder and check for the Restore.env location
\n\u2022 Now, use the copy of Restore.env location also as logs to execute Hard Recovery
\n\u2022 attend prompt
\n\u2022 Run the Hard recovery from Bin folder using Eseutil \/cc \u201cPath of the restore.env containing folder\u201d command
\n\u2022 After a successful completion, the Restore.env folder are going to be empty
\n\u2022 Now, stores are able to mount<\/p>\n\n\n\n
Inevitably, with hands on this manual process, a private can recover Exchange Database with log files. However, this recovery process may be a bit lengthy and isn’t free from manual intervention. Therefore, it becomes susceptible to risks. to beat this, a third-party recovery solution would serve the aim because it is fully automated and free from manual interference.<\/p>\n\n\n\n
Based on experienced and skilled professionals, if a suggestion is to be made then, Mailbox Exchange Recovery may be a sure-shot. it’s tried, tested, and an approved software solution.<\/p>\n\n\n\n
About Exchange Mailbox Recovery<\/p>\n\n\n\n