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Dave-5949 asked RobNicholson-1457 answered

Azure backup completed with warnings

Hello. We have MARS running on 4 identical servers (HyperV hosts). I have a backup that runs on every server. One server has several files failing with DATA FAILURE 0x80070002. All 4 hosts are running MARS 2.0.9200.0. Please let me know what I can do to get this resolved.

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Helloanonymous user-5949
Thank you for reaching out to us!

Exclude the folders with failed files, by using anyone of the steps mentioned below:

Steps 1: Use the policy exclusion in MARS agent console

Or

Steps 2: Perform the following:

Open the registry editor and navigate to the below registry key.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\BackupRestore\FilesNotToBackup
Right click and create a multi-string value with folder name (example LFSAgent as shown in the above sample output), and value data with folder path (example C:\WINDOWS\LFSAgent\Logs * /s in the above sample output)
Replace LFSAgent by folder name and path C:\WINDOWS\LFSAgent\Logs * /s with folder path

Note: As a best practice backup the registry before editing it just to be on a safer side.


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Dave-5949 answered SadiqhAhmed-MSFT commented

What if I want the files to be able to be restored? Additionally why would 1 out of 4 computers have the issue. The directory that the files are in are C:\Windows\WinSxS

I realize that I can probably safely exclude them, since if I have to restore this computer, I would not need to restore these files, but I am just wondering why one computer is different.

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anonymous user-5949 Your questions makes a lot of sense. However, to answer your question why only one computer has an issue and what if the requirement is to restore all the files, we need to investigate the logs and that requires a direction interaction between you and the SME of the product.

There could be many factors for failure:
May be the files are corrupted or being blocked by any 3rd party software such as an Anti-Virus, End-point protection or any other backup solution. One suggestion would be to move those folder/files to a different directory and then try to backup.



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anonymous user-5949 Refer to the guide - https://docs.microsoft.com/en-us/azure/backup/backup-azure-mars-troubleshoot#backup-jobs-completed-with-warning to resolve your issue. If problem persist, contact Azure technical support team by raising a support request.

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RobNicholson-1457 answered

Own of my client periodically gets these DATA FAILURE warnings but when we re-run the job, it's fine. Different files each time but usually within the same sub-folder. But then again, this folder contains most of their working files.

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