MARS/Azure Recovery Services: C:\Windows\WinSxS\ 0x80070002 (File not found)

[Garacesh]

Recently I've been implementing Microsoft Azure Recovery Services to back up our servers to an Azure recovery vault and for the most part it's been working fine.

However I'm seeing the majority of our servers throwing intermittent errors with C:\Windows\WinSxS

 

Annoyingly, it's not always the same server(s), it's not always the same files, and it's not always day-after-day, and the internet seems to be very devoid of information.

 

I don't just want to start excluding the entire folder. The side-by-side catalogue is where it dumps DLLs, it's used for server roles, has a role with boot troubleshooting.. Seems like not backing up this folder would cause a lot of problems.

 

Microsoft's troubleshooting page does list 0x80070002 as The system cannot find the file specified and recommends ensuring the scratch disk/location still exits (it does) and isn't full (it isn't), and setting the MARS client as an AV exception (tried that even though the AV has flagged no issues with it, it's still happening)

 

.txt from one of our DC's]Consider adding these to exclusion list of backup policy.----------------------------------------------

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_netfx4-uiautomationprovider_b03f5f7f11d50a3a_4.0.15744.995_none_eae243df7beaa478\UIAutomationProvider.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\wow64_microsoft-windows-m..server-provider-dll_31bf3856ad364e35_10.0.17763.3406_none_bccf8ed88c3288af\sqloledb.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\wow64_microsoft-windows-com-base_31bf3856ad364e35_10.0.17763.2989_none_65963bfc2ce07613\wincorlib.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_netfx4-presentationnative_b03f5f7f11d50a3a_4.0.15744.995_none_e5a84395fc308a1f\PresentationNative_v0400.dll

[...]

 

.txt from our mail server]Consider adding these to exclusion list of backup policy.----------------------------------------------

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-commonlog_31bf3856ad364e35_10.0.17763.3406_none_cc044969f96495a1\clfs.sys

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-s..urationengineclient_31bf3856ad364e35_10.0.17763.3346_none_859e622caae84829\secrecs.inf

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-s..er-securitytemplate_31bf3856ad364e35_10.0.17763.1_none_78cf07a40ca132b6\dcfirst.inf

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-mfcore_31bf3856ad364e35_10.0.17763.3346_none_3e69260628fe7189\mfcore.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-mfmpeg2srcsnk_31bf3856ad364e35_10.0.17763.3406_none_99294736a02f88da\mfmpeg2srcsnk.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\wow64_microsoft-windows-msauddecmft_31bf3856ad364e35_10.0.17763.3406_none_adf35552880e507c\MSAudDecMFT.dll

[...]

 

.txt from one of our hypervisors]Consider adding these to exclusion list of backup policy.----------------------------------------------

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-appx-deployment-server_31bf3856ad364e35_10.0.20348.887_none_49bd318b40d56e7a\AppXDeploymentExtensions.onecore.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-mspaint_31bf3856ad364e35_10.0.20348.1_none_178c8428b7984f93\mspaint.exe

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-smbserver-powershell_31bf3856ad364e35_10.0.20348.803_none_45cc25854b1ce1fc\SmbClientConfiguration.cdxml

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-msauddecmft_31bf3856ad364e35_10.0.20348.681_none_3e84da190c07de6e\MSAudDecMFT.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-b..ment-windows-minwin_31bf3856ad364e35_10.0.20348.887_none_385989b8862c0081\winload.efi

DATA FAILURE 0x80070002 C:\Windows\WinSxS\wow64_microsoft-windows-dims-keyroam_31bf3856ad364e35_10.0.20348.1_none_ef67bfd62b04a876\dimsroam.dll

[...]

 

.txt from the same hypervisor on a different day]Consider adding these to exclusion list of backup policy.----------------------------------------------

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_windows-secdriver_31bf3856ad364e35_10.0.20348.803_none_a6ec92df92046849\mssecuser.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_windows-senseclient-service.resources_31bf3856ad364e35_10.0.20348.587_en-us_9d717c98a5ca0e39\MsSense.exe.mui

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-appx-deployment-server_31bf3856ad364e35_10.0.20348.887_none_49bd318b40d56e7a\AppXDeploymentServer.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-netapi32_31bf3856ad364e35_10.0.20348.681_none_759bf8e88bc2bdcb\netapi32.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\amd64_microsoft-windows-security-netlogon_31bf3856ad364e35_10.0.20348.803_none_e67818d8c1ea1564\netlogon.dll

DATA FAILURE 0x80070002 C:\Windows\WinSxS\wow64_microsoft-windows-win32k_31bf3856ad364e35_10.0.20348.887_none_abb6076a5914fdac\win32u.dll

[...]

Edited October 14, 2022 by Garacesh