Acronis Cyber Protect 15

Technical Questions & Known Solutions - Backup Functionality

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 Backup: Troubleshooting vSphere Snapshot Issues
Acronis Cyber Protect 15: Backup fails with "Not enough memory" or logs occupy free space on Acronis Management Server
Acronis Cyber Protect: VSS Troubleshooting Guide
Acronis Backup: Corrupted MFT, Run List, Block Bitmap or Index forces Sector-by-Sector backup mode
Troubleshooting Issues with Corrupt Backups
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 Backup Software: "Failed to create volume snapshot"
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, 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 Protect 15, Acronis Cyber Backup 12.5: backup fails with “Failed to connect to the storage node. SocketError”
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 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: Backup fails with "Windows error: (0x800705B4) This operation returned because the timeout period expired"
Acronis Cyber Protect: backup to Acronis Cloud storage fails with "Network connection failed due to timeout."
Acronis Cyber Protect: Backup failures with “Failed to connect to the Agent Core service on this machine” or “The password for the protected backup is incorrect” after agent update to C23.03
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, 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 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 Cloud, Acronis Cyber Backup: backup fails with "VSS writer 'SqlServerWriter' has failed during the snapshot creation"
Acronis Cyber Protect: Troubleshooting Hyper-V snapshot issues
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "A device attached to the system is not functioning"
Acronis Cyber Protect Cloud: Backups fail with "The cloud storage is temporarily unavailable" and "Storage request timeout" on EU DCs
Acronis Cyber Protect: Backup finishes with the error "A device attached to the system is not functioning"
Acronis Cyber Protect: Backup fails with "The request could not be performed because of an I/O device error"
Acronis Cyber Protect, Acronis Cyber Backup: Backup Fails with "Logon failure: unknown user name or bad password"
Acronis Cyber Backup: backup fails with "The shadow copy provider had an unexpected error"
First cloud backup is slow
Acronis Cyber Backup 12.5, Acronis Cyber Protect 15: Attempt to create or apply backup plan finishes with "Communication with cred-store service (host: '127.0.0.1', port: '30667') has failed."
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 "The device is not ready"
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Backup fails with "Unknown status"
Acronis Cyber Protect: backup fails with "no disk space or quota"
Acronis Cyber Protect: Issues when using backup agents newer than 15.0.26321(C21.01 HF1) on OSes related to Windows 7, when the SHA-2 code signing support patch/update from Microsoft is not installed
Acronis Cyber Protect: Application-aware backup of Hyper-V VM fails with "Internal error: Unsuccessful response code '7' of action request"
Acronis Cyber Protect 15: Backup fails with "SocketError: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed" after update to build 26981
Acronis Cyber Protect: Backup to Synology NAS with DSM 7.0-41890 fails with "The credentials for location are not specified"
Acronis Cyber Protect: Agentless backup of Hyper-V machines fails if virtual machines are stored on Microsoft`s Storage Spaces Direct (S2D)
Acronis Cyber Protect: Application-aware backup of a VM ends with a warning "The credentials are incorrect."
Acronis Cyber Protect: Warnings "Failed to load tabs in channel: Error: 400" by C2C backup
Acronis Cyber Protect: CDP backup does not run on DFS replicated folders
Acronis Cyber Backup: Attempt to enable application-aware backup of a virtual machine fails with "Failed to get the object's property 'disk.EnableUUID'"
Acronis Cyber Protect: macOS backup fails with "Operating system error: Resource deadlock avoided"
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 Backup: Alert "The running backup has not shown any progress for some time and may be frozen" appears during backup of virtual environment
Acronis Cyber Protect: VM backup or running VM from backup fails with "The specified module could not be found" if Microsoft Visual C++ 2017 Redistributable is not installed with VMware VDDK 7.0
Acronis Cyber Protect: Backup of SAN Storage Fails with a VSS-Specific Error
Acronis Cyber Protect: C2C backup of Microsoft 365 items is slower than expected due to Microsoft throttling
Acronis Cyber Protect Cloud, Acronis Cyber Backup: Disk backup fails with "Incorrect function"

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