Hello All , 

I am getting this warning Potential data loss warning  Potential data loss warning in Exchange 2013 Mailbox  " RetentionAgent: RetentionAgent: Warning: Potential data loss. The size of this folder X:\Program Files\Microsoft\Exchange Server\V15\Logging\Diagnostics\DailyPerformanceLogs has reached 70% of max size allowed - 5120 MB. Some data will be purged once it reaches the max limit " . 

Event id 1013 source MsExchangeDiagnostics 

how  can resolve the warning !! 

Thank you  

Hi Mohamamd ,

 Reason for this error :
Exchange Diagnostic service logs an error message when DailyPerformanceLogs folder reaches the value described in MaxSize as in below file located on C:\Program Files\Microsoft\Exchange Server\V15\bin\:
Microsoft.Exchange.Diagnostics.Service.exe.config

Resolution:
-


Temporary Solution :

Open below file in notepad:
C:\Program Files\Microsoft\Exchange Server\V15\bin\Microsoft.Exchange.Diagnostics.Service.exe.config

Change the LogDataLoss = False under the DailyPerformanceLogs section to suppress this error.

Save the file and the restart to Microsoft Exchange Diagnostics service to force it to read in the configuration file and all should be well.


Permanent Solution :
Change the path to the drive  where the log files get saved  and the disk holds sufficient space for storing these logs.

Hi,

In the X:\Program Files\Microsoft\Exchange Server \V15\Logging\Diagnostics\DailyPerformanceLogs folder, you will find files named ExchangeDiagnosticsDailyPerformanceLog_MMDDHHMM.blg. These files are used by Managed Availability framework (which runs as the Microsoft Exchange Health Management service) to track the health of system components in Exchange. And they are generated automatically and take up disk space.

You can control how much data is stored in the daily performance logs by editing the Microsoft.Exchange.Diagnostics.Service.exe.config file, as what Sathish suggestioned above.

You may find the following:

<add Name="DailyPerformanceLogs" LogDataLoss="True" MaxSize="5120" MaxSizeDatacenter="2048" MaxAge="7.00:00:00" CheckInterval="08:00:00" />

You can change the value of LogDataLoss to "False" or increase the MaxSize and MaxAge values to higher if you have the space.

Best regards,

If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

Hi,

Is there any update on this issue?

Best regards,

If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

hi

inserting false occur event id 6004 :
MSExchange Common ( 6004 ) " ADDriverLogs : Failed to write logs Because of the error : Access to the path ' Microsoft.Exchange.Store.Worker.exe __ * . LOG ' is denied

strangely the file is missing in dir
V15\ Logging\ ADDriver\

kurmi