KSC backup task fails with error "Database is corrupted. One or more repositories are corrupted" [KSC for Windows]

[Antipova Anna]

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Problem Description, Symptoms & Impact

KSC 14 is installed and everything is working fine except the backup task: Database is corrupted. One or more repositories are corrupted.

Workaround & Solution

The error may occur because of the operating system malfunction or an unexpected reboot of the system with disk caching enabled (for example, due to a power loss). This leads to the corruption of the Kaspersky Security Center repositories.

https://support.kaspersky.com/ksc13/troubleshooting/other/15975#block7

In the event log it can be found that some repositories are corrupted and can’t be restored. It's suggested to restore KSC from an archive which was created before the issue appearance. If it doesn’t help, KSC reinstalling may be needed.

What can be checked additionally?

You may also check System event log for the large number of any warnings, such as events 50 or 140.

These events may be a sign of a file system problem. If NTFS events such as Event ID 55, 50, 140, and 98 are logged, Microsoft suggests running the "chkdsk" utility. Because NTFS couldn't write data to the transaction log, this could affect the ability of NTFS to stop or roll back the operations in which the transaction data couldn't be written: https://learn.microsoft.com/en-us/troubleshoot/windows-server/backup-and-storage/troubleshoot-data-corruption-and-disk-errors#troubleshooting-event-id-55-and-98.