Start a new backup chain. Keep the old one for recovery purposes only

The backup is on an external disk which is unavailable at the time of the validation

Unmount any backups that you have or reboot the machine to solve the issue


Instructions for deleting volume streams in case of data corruption.


When Acronis Files Connect (formerly ExtremeZ-IP) Administrator Volumes tab indicates a Volume failed to initialize, this may indicate a corrupted mapping stream. To resolve simply remove the volume and add it back. The act of removing and adding the Volume back will automatically delete and recreate the mapping stream.


Backup to Acronis Cloud fails with the error "Cannot open the encrypted stream":


The symptom may have different root causes. Please follow the troubleshooting steps below to localize the issue and fix it.