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Message: The shadow copy provider had an unexpected error while trying to process the specified operation

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Beginner
Posts: 4
Comments: 13

I am working an issue with backups and them failing due to issues with the VSS service.

Please see attached screenshots to see error log.

I think I can use one of the following kb articles but not 100% sure.

https://kb.acronis.com/content/22373

https://kb.acronis.com/content/37472

Attachment Size
top.of_.error_.list_.jpg 3.88 MB
bottom.of_.error_.list_.jpg 3.39 MB
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Forum Moderator
Posts: 237
Comments: 6946

Hi Chris,

Thank you for your posting! Yes, please proceed with the article https://kb.acronis.com/content/22373. I would also recommend to delete the Acronis VSS Provider from the registry:

  • regedit -> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\VSS\Providers\
  • navigate to the key {f782463b-33bb-4043-ad8d-60b728d26a6c} - it's Acronis VSS Provider
  • export this key and then delete it
  • (!) Do not delete the second key, it's Microsoft VSS Provider.

Test backup. If the issue persits, please follow the troubleshooting steps from this article.

Thank you,

Beginner
Posts: 4
Comments: 13

Able to backup successfully with VSS disabled, unable to set System Provider as VSS service.

Beginner
Posts: 4
Comments: 13

Attaching latest error reports using the following steps:

Error1 - deselecting the d drive from the backup settings and leaving vss on in auto
Error2 - VSS to software-system provider and left the d drive in the back up setting
Error3 - vss system provider and d drive out of the back up setting

Attachment Size
279330-120481.txt 6.64 KB
279330-120484.txt 6.63 KB
279330-120487.txt 6.63 KB
Beginner
Posts: 4
Comments: 13

Site is going to attempt kb 22373 and the registry edits.

Also reporting that the VSS selections are Enable or Disable only

Forum Moderator
Posts: 237
Comments: 6946

Hi Chris,

  1. Select System Provider in the VSS settings;
  2. Make sure that there is sufficient free space on each volume for shadow copies (Troubleshooting part, 1.2)
  3. VSS writers should be enabled and in consistent state: Go to Start -> Run -> cmd. Execute the command: vssadmin list writers. If any errors, please contact Microsoft Support.

Thank you,

Beginner
Posts: 4
Comments: 13

Site attempted the article and stopped at the registry changes with the following note:

'The file listed below was not in the registry for DC2'
delete the Acronis VSS Provider from the registry:
• regedit -> HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\VSS\Providers\
• navigate to the key {f782463b-33bb-4043-ad8d-60b728d26a6c} - it's Acronis VSS Provider
• export this key and then delete it
• (!) Do not delete the second key, it's Microsoft VSS Provider.

Why would there not be an Acronis VSS registry key and how do we recover the key to that location?