process name (process id) %3The log signature of the existing logfile file name doesn’t match the logfiles from the backup set. Logfile replay cannot succeed unless all signatures match.

Details
Product: Exchange
Event ID: 457
Source: ESE
Version: 6.5.0000.0
Message: process name (process id) %3The log signature of the existing logfile file name doesn’t match the logfiles from the backup set. Logfile replay cannot succeed unless all signatures match.
   
Explanation

Mismatched log files have been detected. You are restoring

to a recovery server that has a different set of log files. Log file replay

cannot succeed unless all signatures match.

You will receive the following phrase in the event

Description:

Information Store (number) The log signature of the

existing logfile E0n.log does not match the logfiles from the backup set. Logfile

replay cannot succeed unless all signatures match.

The basic reason for the event is that the E0n.log file (the

current log file for the storage group, such as E00.log) has a different log

signature than the log files that have been restored from the online restore. 

A typical scenario for this to happen is as follows.  All the information

store service files have been removed. In order to restore an online backup of

an Exchange computer, you must have the Microsoft Information Store

running. If you have not checked “Do not mount this store at start-up” on the

Database tab, and you start the Information Store service, then a new E00.log

file is created.  The log signature for this file does not match the

signatures of the log files from the backup, and the Information Store fails to

replay logs and mount the databases.

   
User Action

Dismount all the databases in the storage group.  Do

an offline backup and then remove all Information Store log files and check files

for the storage group.  Check “Do not mount this store at

start-up” on the Database tab for all databases in the storage group. 

Start the Information Store service.  Uncheck “Do not mount this store at

start-up” on the Database tab for all databases in the storage group. Perform

the online restore.

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