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'

Symptoms

You start a partition or disk backup with VSS-snapshot enabled;
Backup fails with one of these messages:
The shadow copy provider had an unexpected error while trying to process the specified operation.

See the full error message

Error code: 13
Module: 149
LineInfo: d1ab7fa1e56ec81c
Fields: $module : disk_bundle_vs_37976
Message: Failed to perform the requested operation.
--------------------
Error code: 236
Module: 16
LineInfo: 7bb42efe3c733241
Fields: $module : disk_bundle_vs_37976
Message: Internal error: Attempt to access emulated disk for non-initialized object.
--------------------
Error code: 94
Module: 83
LineInfo: 383ffdb092990e22
Fields: $module : hv_srv_vs_37976
Message: Failed to open virtual disk file 'C:\ClusterStorage\Volume3\Hyper-V\VMname\Virtual Hard Disks\VMname_C.vhd'.
--------------------
Error code: 212
Module: 83
LineInfo: 383ffdb092990dd9
Fields: $module : hv_srv_vs_37976
Message: Failed to create a multi-volume snapshot where files are located:
---------------------
Error code: 207
Module: 83
LineInfo: 383ffdb092990dca
Fields: $module : hv_srv_vs_37976
Message: Failed to mount the volume snapshot.
--------------------
Error code: 33
Module: 7
LineInfo: e24f93d0b8d8c9c7
Fields: $module : hv_srv_vs_37976
Message: Failed to create volume snapshot.
-------------------
Error code: 50242
Module: 16
LineInfo: 14181c22ef45b0f6
Fields: $module : hv_srv_vs_37976
Message: Failed to start creating the volume snapshot.
--------------------
Error code: 9
Module: 0
LineInfo: 2aacb7b2ab852ac
Fields: code : 2147754767, $module : hv_srv_vs_37976
Message: The shadow copy provider had an unexpected error while trying to process the specified operation.
--------------------
Acronis Knowledge Base: http://kb.acronis.com/errorcode/
Event code: 0x0095000D+0x001000EC+0x0053005E+0x005300D4+0x005300CF+0x00070021+0x0010C442+0x00000009+0x8004230F

The request is not supported

See the full error message

Error Code: 50247
Modules: 16
Info Line: 14181c22ef45b0dd
Fields: $ module: disk_bundle_vs_32266
Message: Take a snapshot of volume '\ Device \ HarddiskVolume1' failed.
--------------------
Error code: 9
Modules: 0
Info Line: 2aacb7b2ab852ac
Fields: code: 50, $ module: disk_bundle_vs_32266
Message: Unknown status.
--------------------
Error Code: 65520
Modules: 0
Info Line: bd28fdbd64edb8e0
Fields: code: 2147942450, $ module: disk_bundle_vs_32266
Message: The request is not supported
--------------------
12 Information 15/11/2012 23:50:18 Volume 0-0 is blocked ...
13 Error 11/15/2012 23:50:29 Action with partition '0 -0 'was terminated.
Details:
Creating the volume snapshots failed.
Error code: 0x70021
$ Module = "disk_bundle_vs_32266"
Day 0xDF81DA2C74EC50B7
Failed to set the snapshot bitmap.
Error code: 0x10C44E
blocks = 25599 (0x63FF)
$ Module = "disk_bundle_vs_32266"
Day 0x14181C22EF45AE20
Not locked.
Error Code: 0x9
code = 3758096392 (0xE0000008)
$ Module = "disk_bundle_vs_32266"
Day 0x2AACB7B2AB852AC
Additional info:
--------------------
Error Code: 502
Modules: 1
Info Line: a164035b3ff39287
Fields: $ module: disk_bundle_vs_32266
Message: Action with partition '0 -0 'was terminated.
--------------------
Task 'Full backup' has failed on machine 'xxx'.

Solution

Check Windows Application Logs.

Windows Application Event Log contains Event ID 12292 and Event ID 22

Windows Application Event Log contains Event ID 12292 and Event ID 22.

See the full error message

On the Hyper-V server, the Application Event Log will show Event ID 12292 and Event ID 13.

See the full error message

Cause

VSS Provider with CLSID specified in the Application Event Log eror message fails during VSS snapshot initialization and causes the snapshot failure.

Example: backup fails due to the faulty Dell EqualLogic VSS HW Provider

Solution

To solve this issue, fix the faulty VSS Provider:

Check whether the faulty VSS Provider is registered. Issue:
vssadmin list providers
Check whether the corresponding service exists and is enabled:
- Go to services and find the VSS Provider service. Set it to manual start.
- Go to registry and find the VSS Provider service. Make sure the reg key is not empty:
  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services[VSS Provider Name]
If one of above is not fulfilled, run a repair installation of the provider. Start the Software installation package and repair/re-install the software including the VSS Provider. Run the installation package, select "Install", then select "Repair". Contact the vendor of a third-party software to resolve the issue with the provider.
If re-installation is not possible or does not help, unregister the VSS Provider to resolve the issue:

1. 1. Open Windows registry editor. Go to Start -> Run -> regedit.exe -> hit Enter;
  2. Navigate to this key:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\VSS\Providers\
  3. Click then on Providers and delete the subkey (priorly exporting it as a backup) with the CLSID specified in the Windows Application Event Log
    
    (!) Do not delete Microsoft VSS Provider. Keep the green marked entry! Otherwise the Windows VSS provider will no longer operate.

Windows Application Event log contains Event ID 8193 and Event ID 12293

Windows Application Event log contains Event ID 8193 and Event ID 12293.

See the full error message

Cause

Insufficient space allocated for shadow copy or shadow storage not set.

Solution

In order to check that the volume has enough space for the shadow copy, create a shadow copy using the tools integrated in Windows and make sure the shadow copy is created successfully. If required, move the shadow storage to another volume or free up space on the volume.

Select type of the operating system that is being used: Server OS or Workstation OS.

Server OS:

Workstation OS:

If the volume that you back up has enough free space to store the snapshots, you can resize the shadow storage with the vssadmin resize shadowstorage command. See also Microsoft TechNet: Vssadmin resize shadowstorage.

For example:
vssadmin resize shadowstorage /for=c: /on=c: /maxsize=20GB

(!) If you would like to allocate all of the volume's free space for the storage, use the unbounded value. E.g. vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded

More information

Troubleshoot VSS-related issues with the free Acronis VSS Doctor tool.

Knowledge Base

37472: 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'

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