ddb backups missing files during backup

Anything in the OS Event logs at this time for VSS?

Antivirus Exclusions are they in place ?

If you have a DDB backup before the issue occurred, we can attempt to recover the DDB and try backups again. 

Other things to verify, is it happening for only one MA ? Is it happening for one client backups only ? Any other pattern that can narrow down the issue or help with any clues for resolution?  Check with your security team for any weirdness with AV or ransomware
 

Hello @roc_tor 

This error is not from the DDB partition being corrupt, but it occurs when there was an issue with the VSS Snapshot. Can you check Event Viewer for VSS errors? Also can you confirm if AV exclusions are in place? It’s also possible that AV is preventing us from reading from the snapshot.

https://documentation.commvault.com/2023e/essential/antivirus_exclusions_for_windows.html

Thank you,

Collin

Servers - we have two servers, this is only happening on one.

Event Logs - VSS Service.  Nothing out of the ordinary.  Just lots of VSS service is shutting down due to idle timeout.

Zubair:  Nothing with virus (and we do have the exceptions set up).  It’s Sentinal One (S1)… As for other patterns, this is just a snapshot of the ddb drive and it’s commvault files that are “missing”.  While we do ahve FS agents on various things, most of our setup is VMs and nothing like THIS is happening.  

The way I see it - our backups are really useless on the dayS (sometimes it works, most of the time it doesn’t) it doesn’t work.  

I just picture the shadow not taking.. and the FS agent is backing things up a live FS.  That’s what it LOOKS like, but the shadow’s taking.

 

Collin & Zubair - I’ve seen the AV exclusions, but everything still just smells like AV.  I’ll try turning it OFF.  Let’s see what happens.