Acronis Cyber Backup 12.5

Technical Questions & Known Solutions - Backup Functionality

Acronis Cyber Protect Cloud, Acronis Cyber Backup: operation fails with "data is corrupted: CRC mismatch or internal data structures mismatch" or "The archive is corrupted"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: backup fails with "VSS writer 'SqlServerWriter' has failed during the snapshot creation"
Acronis Cyber Protect: VSS Troubleshooting Guide
Acronis Cyber Protect, Acronis Cyber Backup: Backup of a Linux machine fails with "The SnapAPI kernel module is not loaded for the kernel currently running on the system"
Acronis Cyber Backup: backup fails with "VSS writer has timed out" or "The backup has failed because 'VSS Writer' has timed out during snapshot creation."
Acronis Cyber Protect: Backup Fails with "There is not enough space on the volume where the snapshot storage is located"
Acronis Cyber Protect, Acronis Cyber Backup: Operation fails with "Windows error: (0x80070299) The requested operation could not be completed due to a file system limitation" or "Cannot write data to file <path> due to a file system limitation"
Acronis Cyber Protect: Troubleshooting Hyper-V snapshot issues
Troubleshooting Issues with Corrupt Backups
Acronis Cyber Protect: Backup fails with "The request could not be performed because of an I/O device error"
Acronis Cyber Backup: backup fails with "The operation has timed out"
Acronis Cyber Protect, Acronis Cyber Backup: "The activity has failed due to a restart of the service" or "The activity has failed due to an unexpected machine reboot or the backup process was terminated." error
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Disk backup fails with "Incorrect function"
Acronis Cyber Protect, Acronis Cyber Backup: Backup Fails with "Logon failure: unknown user name or bad password"
Acronis Cyber Backup: Backup of SQL instance fails with "There are no SQL writers" or "No SQL writers are found in the operating system."
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "A device attached to the system is not functioning"
Acronis product fails to back up a VMware virtual machine with "Creating a quiesced snapshot failed" or "An error occurred while quiescing the virtual machine"
Acronis Cyber Protect: backup fails with "Network disconnected", "The network path was not found" or "Cannot connect to the machine where network share is located"
Acronis Cyber Protect: backup to Acronis Cloud storage fails with "Network connection failed due to timeout."
Acronis Cyber Protect Cloud, Acronis Cyber Backup: "The credentials for 'path' are incorrect." or "The user name or password is incorrect"
Acronis Cyber Backup: backup fails with "The shadow copy provider had an unexpected error"
Acronis Cyber Backup: "There hasn't been a successful backup for more than X days" alert
Acronis Cyber Backup: Backup fails with "Access to the file is denied"
Acronis Software: Troubleshooting Scheduled Backup Issues
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "The snapshot creation has failed due to a hardware issue or a conflict with your disk hardware. Windows has reported the following error: The device has a bad block"
Acronis Cyber Protect, Acronis Cyber Backup: Operation fails with "Windows error: (0x8007051F) There are currently no logon servers available to service the logon request"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "Insufficient system resources exist to complete the requested service"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: backup finishes with warning "Creating a crash-consistent snapshot of virtual machine because the creation of its application-consistent snapshot has failed"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: backup fails with "CRC error" or "Failed to read the snapshot"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "Unknown status"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "The activity has failed because the machine has been shut down unexpectedly"
Acronis Cyber Backup Advanced: Troubleshooting Tape Detection Issues
Acronis Cyber Protect Cloud, Acronis Cyber Backup: backup fails with 'The shadow copy provider had an unexpected error while trying to process the specified operation'
Acronis Backup: Corrupted MFT, Run List, Block Bitmap or Index forces Sector-by-Sector backup mode
Acronis Cyber Backup, Acronis Cyber Protect: Activity fails with "Windows error: (0x800704C8) The requested operation cannot be performed on a file with a user-mapped section open"
Acronis Cyber Protect: Backup fails with "Windows error: (0x800705B4) This operation returned because the timeout period expired"
Acronis Cyber Protect Cloud: Cloud backups fail on EU2 DC
Acronis software: *.OST-file is not backed up
Acronis Cyber Protect: Backup Fails with "Cannot back up virtual machines of the ESX/ESXi server because the "vStorage APIs" feature is not installed on the server"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: backup fails with 'Common I/O error'
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Quiesced snapshot creation fails for Windows Server 2019 VMs on ESXi 6.5 or 6.7
Acronis Cyber Backup: Operation fails with "Failed to lock the file"
Acronis Virtualization: Backup of Virtual Machine Fails with "Failed to open the virtual machine"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "The device is not ready"
Acronis Cyber Protect: operation fails with "The activity has failed due to a planned restart of the operating system"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Activity fails with "Misc error while local file io"
"Backup status is unknown" alert
Acronis Cyber Backup: virtual machine backup troubleshooting guide
Acronis Cyber Backup: backup completes with warning "Link target was not backed up" or "The file is out of backup scope"
Acronis Cyber Protect 15, Acronis Cyber Backup 12.5: backup fails with “Failed to connect to the storage node. SocketError”

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