VSS

With the Enabled VSS support option Acronis True Image Echo errors out with the "Unable to create volume snapshot" error message when trying to backup a hard disk drive with EISA diagnostic partition

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

As a workaround, disable the VSS support in Acronis True Image Echo

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

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

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

Unlock the partition using diskpart

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:

Hardware/Firmware

Disk partitions, file systems

Symptoms

Backup with activated Volume Shadow Copy fails with the following error similar:

The backup has failed because 'VSS Writer' has failed during snapshot creation.

This error can be produced by different VSS writers, see some examples below:

 

This article describes how to resolve and troubleshoot the error "Error creating snapshot" encountered while backing up a physical or virtual machine. Generally following snapshot errors may occur:

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
  1. You use Acronis Backup 12.5 or Acronis Cyber Cloud
  2. You run a backup of a Microsoft SQL database
  3. Backup fails with the following error:

Problems detected that may cause a VSS snapshot failure. Trailing spaces in the path. To remove the trailing spaces, run the T-SQL command: ALTER DATABASE MODIFY FILE

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:

Recovery of MS Exchange database/storage group fails if committed transaction log is missing in the backup

Backup fails with:

The backup has failed because 'VSS Writer' has timed out during snapshot creation

 

OR

Windows error: (0x800423F2) VSS writer 'System Writer' with class ID 'E8132975-6F93-4464-A53E-1050253AE220' has timed out. This may be caused by too intensive I/O on the machine at the backup start time. Try to re-schedule the backup to some different time. To troubleshoot VSS issues, download and run Acronis VSS Doctor available at https://www.acronis.com/en-us/personal/vss-diagnostic-free-tool/

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).

2. In order to avoid VM going into "saved" state during backup, make sure that the Integration services -> Backup (Volume checkpoint) option is enabled in VM settings in Hyper-V Manager.

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