Instructions on how to enable Microsoft native VSS instead of the default Acronis VSS in Acronis Backup & Recovery 10

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.

How to create backup with these applications

Activate Acronis VSS provider or turn off VSS entirely

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 VSS provider is used to initiate creation of VSS snapshot, but MS VSS service is actually used

Introduction

Acronis software may give errors, freeze or produce other undesired effects when there are issues with parts of the computer environment it operates in:

Change the databases to Simple Recovery Mode

Turn on the MS Exchange VSS Writer to fix the issue

While using the VSS backup option to back up complex applications, you may encounter issues with creating volume snapshot/shadow copy. This article provides instructions on how to troubleshoot and resolve such issues.

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.
------------------------
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.

All conditions must be true:

1. Act! software and Microsoft SQL Server are installed
2. Acronis True Image does not create a backup. If you click the red exclamation mark at the center of the backup screen, the following error message is displayed:
   1. Entire PC and disk/partition backups: Unable to create volume snapshot
   2. File and folder backup: Failed to backup file or folder
3. The last modified log file at C:\ProgramData\Acronis\TrueImageHome\Logs\ti_demon contains the following text: VSS writer 'SqlServerWriter' with class ID 'A65FAA63-5EA8-4EBC-9DBD-A0C4DB26912A' has failed to process the snapshot