Resolving "Current CBT FLT Driver Versions Seems to be Invalid" Issue in BDRSuite

Current CBT FLT Driver Versions Seems to be Invalid" Issue in BDRSuite

KB ID: 104034
Summary:
This knowledge base article addresses the issue of Hyper-V backups failing with the error message "Current CBT FLT Driver Versions Seems to be Invalid" in Vembu-VMBackup. The error can occur due to reasons such as corrupted or hung VembuCBT drivers, inadequate permissions for the specified path, or outdated VembuCBT drivers.
Cause:
The "Current CBT FLT Driver Versions Seems to be Invalid" error arises from the following circumstances:
1. Corruption or hanging of VembuCBT drivers.
2. Insufficient permissions for the designated path, i.e., <C:/ProgramData/VembuHyperVCBTStore/…>.
3. Usage of outdated VembuCBT drivers.
Solution:
To resolve this issue, follow these steps:
1. Administrative Command Prompt:
Open the command prompt with administrative privileges.
2. Reinstalling VembuCBT Driver:
  1. Navigate to the installation location of Vembu Integration Service.
  2. Execute the following commands to uninstall and reinstall the VembuCBT driver:
  1. VembuInstallationLocation\Drivers\HyperV>HyperVDriverUtil.exe -uninstall
  2. VembuInstallationLocation\Drivers\HyperV>HyperVDriverUtil.exe -install
3. Verification:
After executing the commands, input "fltmc" and press 'Enter' to display the list of drivers. Confirm the presence of VembuCBT.
4. Additional Backup:
As the VembuCBT driver has been reinstalled, perform an additional full backup for all backup jobs configured from the affected host.
Note: By adhering to these instructions, you can rectify the "Current CBT FLT Driver Versions Seems to be Invalid" issue within BDRSuite. Following these steps diligently will ensure the restoration of proper backup functionality and eliminate the error message.


    • Related Articles

    • Troubleshooting CBT_FAILURE in BDRSuite

      KB ID: 104012 Cause: The CBT (Changed Block Tracking) driver in BDRSuite may become unresponsive due to environmental problems or handle/memory leaks. Additionally, high levels of I/O can lead to extended snapshot quiescing, potentially causing ...

    • Backup aborted

      KB ID: 101005 Product: BDRSuite Backup Server Cause This will occur due to the following reasons: Backup configuration stored in the server and client is incompatible. When the Backup storage location is inaccessible to the backup server. If you ...

    • Title: Backup Success with CBT Failure: Handling Full Resend of VM Data in BDRSuite

      KB ID: 105070 Summary: This knowledge base article addresses the scenario where a backup operation is reported as completed successfully, but Change Block Tracking (CBT) fails for a specific VM in BDRSuite. This situation arises due to multiple ...

    • BDRSuite Server Crash due to Dokan Driver Initialization Failure on Windows Backup Servers

      KB ID: 115025 Cause: The BDRSuite and OffsiteDR Service fail to start if there is an unsuccessful initialization of the Dokan driver on Windows-based Backup Servers. Solution: Follow the steps below to resolve the Dokan driver initialization issue on ...

    • Troubleshooting: Invalid Guest Credentials Error in BDRSuite

      KB ID: 115073 Cause: When running a VM backup or replication job with app-aware options enabled, you may encounter the "Failed::Invalid guest credentials" error. This error occurs when the guest credentials provided for the guest machine are ...