This has been fixed
VSS
Download and run the script on the host machine to fix the issue
Instructions on how to enable Microsoft native VSS instead of the default Acronis VSS in Acronis Backup & Recovery 10
Make sure the backup is run under administrator or that you back up without using VSS
Installation of Acronis Product fails with SnapVssProvider Error in MSI log. This article provides information on how to find, identify and resolve typical errors in MSI logs of Acronis software.
Compatibility issue of Acronis True Image with NTBackup
How to create backup with these applications
You either have 1) Windows Server 2008 R2, or 2) Windows Small Business Server 2011, or 3) EFI system partition, or 4) EISA service partition
Activate Acronis VSS provider or turn off VSS entirely
Instructions on how to enable Microsoft native VSS instead of the default Acronis VSS in Acronis Backup
You are running a single-pass backup of SQL instances that fails with the error. To fix this issue, re-register the VSS service
Acronis Backup Advanced 11.5 for Hyper-V: Agentless Backup of VMs on SMB 3.0 Shares Is Not Supported
Hyper-V VMs on SMB3.0 shares backup is not supported
Acronis VSS provider is used to initiate creation of VSS snapshot, but MS VSS service is actually used
The reason is that the backup was created with disabled VSS support
Unlock the partition using diskpart
Change the databases to Simple Recovery Mode
As a workaround, use Microsoft VSS instead of Acronis VSS
Turn on the MS Exchange VSS Writer to fix the issue
Backup on Windows XP fails with error "Failed to create volume snapshot" if MS SQL Server is installed.
The “File Server VSS Agent Service” role service must be enabled on the file server hosting SMB3.0 share.
This article applies to:
Symptoms
Backup activity fails with the following error:
Operating system error: The shadow copy provider had an error. Check the System and Application event logs for more information.
You are protecting Windows Server 2008 R2 with Acronis software.
Backup fails with the following error messages:
Error code: 1098825
Fields: {"$ module": "disk_bundle_vsa64_xxxxx"}
Message: Locking of volume snapshot failed.
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Error code: 9
Fields: {"$ module": "disk_bundle_vsa64_xxxxx", "code": 3758096391}
Message: Already blocked.
While checking VSS doctor report or Windows Application Event log you find the following (or quite similar):
Volume Shadow Copy Service error: Unexpected error calling routine RegOpenKeyExW (-2147483646, SYSTEM \ CurrentControlSet \ Services \ VSS \ Diag, ...). hr = 0x80070005, access denied.
You are protecting Windows Small Business Server 2011 Standard.
When checking VSS doctor report or Windows Application Event log you found the following (or similar) warning for "spsearch account" and 1376 status code:
Type: Warning
Source: VSS
Message: Volume Shadow Copy Service error: Unable to resolve spsearch account with status 1376. Check connection to domain controller and VssAccessControl registry key. Operation: Collecting Write Process Data Asynchronous Operation Execution Context: Execution Context: Requestor Current Status: GatherWriterMetadata Error Details: Error: NetLocalGroupGetMemebers (spsearch), 0x80070560, The specified local group does not exist.
InstanceId: 8230
SearchLink: https://www.google.com/#newwindow=1&q=VSS+event+id+8230
Recovery of MS Exchange database/storage group fails if committed transaction log is missing in the backup
Symptoms
Application-aware backup fails with one of these errors:
Error 1
Error code: 34865165
Fields: {"$module":"aavb_backup_command_addon_vsa64_23140"}
Message: Failed to get the metadata from the 'VMware Snapshot Provider' extension library.
------------------------
Error code: 65520
Fields: {"$module":"aavb_backup_command_addon_vsa64_23140","code":2147942402}
Message: The system cannot find the file specified
Symptoms
Disk/partition backup fails with:
Windows error: (0x80070001) Incorrect function
Description
Acronis Cyber Protect Home Office and Acronis True Image support VSS-aware databases for both disk-level and file-level backup.
Symptoms
You are installing Agent on a Windows 2003 or Windows 7 machine.
The installer shows the following warning:
The KB940349 update is not installed on this machine. Install this update to avoid disk backup failures
Cause
An outdated VSS version is installed on the machine. To guarantee correct backup functioning, we always recommend updating VSS components to the latest available versions.
Backup task hangs at "Calculating time remaining..."
This article applies to backups of Hyper-V VMs performed by Agent for Hyper-V (agent-less)
About
Prerequisites
Prior to performing the backup, make sure that the below prerequisites are met:
1. Hyper-V Integration Services must be up-to-date and running inside the virtual machine(s).