windows agent backup error vss [0x80042306]

Hi @mike.chen ,

this is a Microsoft limitation with VSS.

VSS supports volumes up to 64TB only.

You can configure your backup job to work without a VSS snapshot (File-level backup), then the backup will work. But it will be slower…

And you won’t be able to restore the whole volume. You have to create the volume and format it. After that you can restore the files and folders.

Joe hit it on the head about VSS and larger than 64TB limit volumes.  There is nothing that can be done to fix this.  You can post in the forums about it as a suggestion - https://forums.veeam.com

Hi @mike.chen -

As both Jochen and Chris shared...your volume size is a limitation. It is mentioned in the Agent for Windows Guide, as well in the Sys Req’s:
https://helpcenter.veeam.com/docs/agentforwindows/userguide/system_requirements.html?zoom_highlight=64+tb&ver=60

thank you for reply!

I use file level backup !

how to do use without vss backup step by step

When creating your Job, do not select to use Guest Processing option (don't check the box) 

https://helpcenter.veeam.com/docs/agentforwindows/userguide/backup_job_vss.html?ver=60

thanks you

I try it!

No problem Mike 

sorry same issue,backup error below:

2024/10/30 下午 12:06:27 :: Creating VSS snapshot Error: Failed to create snapshot: Backup job failed.
Cannot create a shadow copy of the volumes containing writer's data.
VSS asynchronous operation is not completed. Operation: [Shadow copies commit]. Code: [0x80042306]. Failed to create snapshot: Backup job failed.
Cannot create a shadow copy of the volumes containing writer's data.
VSS asynchronous operation is not completed. Operation: [Shadow copies commit]. Code: [0x80042306]. 
 

That's because your volume size is too large. Your error is not Veeam-related 

so I　ｂａｃｋｕｐ　ｗｉｔｈｏｕｔ　ｖｓｓ　ｈｏｗ　ｔｏ　ｄｏ

It is not related to VSS it is the volume being too large.  Veeam cannot back it up properly.  If you still have problems open a support ticket.

ok,I done 

thanks your replay!

This 64TB limitation was discussed multiple times in our RnD forum :)

There are a few solutions.

Split your disk into smaller volumes or use Storage integration to backup it if it’s on a supported storage appliance. Another option would be to use a File Backup Job.

Best,

Fabian

I do use  File Backup Job to backup ,but the issue run againt

The file level backup in Veeam Agent is not the same as a File Backup Job I have mentioned. 

Veeam Agent File Level Backup Job (requires VSS): https://helpcenter.veeam.com/docs/backup/agents/agent_job_mode.html?ver=120

Veeam File Backup Job without the Veeam Agent (part of Veeam Backup & Replication, no VSS required for backup from SMB shares): https://helpcenter.veeam.com/docs/backup/vsphere/file_share_backup_job.html

Adding SMB share: https://helpcenter.veeam.com/docs/backup/vsphere/file_share_backup_add_smb_file_share.html?ver=120
 

Best,

Fabian

ok,I try!

thanks