Forum Discussion

dsoutherland's avatar
dsoutherland
Copper Contributor
Jun 16, 2021

Windows Server 2019 Backup Stopped working

Hi

 

I have a Windows Server 2019 Standard that Windows Server 2019 Backup Stopped working.  Worked great for over a year.

Here is error :

The backup operation that started at '‎2021‎-‎06‎-‎13T03:30:22.766521300Z' has failed with following error code '0x8078014D' (There was a failure in updating the backup for deleted items.). Please review the event details for a solution, and then rerun the backup operation once the issue is resolved.

 

I also got an error with invalid option .

 

I am backing up one Folder to a NAS.  ioSafe running Synology OS.

As a side note : I have a VM server running on this server that is backing up 2 folders to same NAS. Same issue.

 

What I have tried.

1. Freed up space on NAS.

2. On NAS resetup folders backed up to. Made sure folders  for  Physical Backup and VM have correct permission and NAS user with permission to do the job.

3. Uninstalled Windows server Backup and reinstalled. 

4. Re Setup Backup Jobs.

5. Server updates are done monthly and I think NAS OS is up to date.

 

Any Ideas?

 

Thanks you very much in advance!

 

Dexter Southerland

storage
windows server

1 Reply

  • Jamony's avatar
    Jamony
    MCT
    Sep 19, 2026

    Since both the physical server and VM started failing when backing up to the same NAS, I would investigate the backup destination and existing backup set before reinstalling Windows Server Backup again.

     

    The error:

     

    0x8078014D

    There was a failure in updating the backup for deleted items

     

    suggests the failure occurs while Windows Server Backup is updating the existing backup data.

     

    As a clean test, create a completely new NAS share/subfolder and run one backup to that new location. Microsoft documents that backups written to the same remote share can replace the previous backup, which is another reason to separate backup destinations carefully.

     

    I would then check:

     

    vssadmin list writers

     

    and review:

     

    Event Viewer

    → Applications and Services Logs

    → Microsoft

    → Windows

    → Backup

    → Operational

     

    Also check Synology logs for SMB errors, quotas, snapshots, file locking or storage errors.

     

    If the backup succeeds immediately to a new share, the old backup set/share is the likely problem. If the new share also fails, investigate VSS and SMB connectivity next.

     

    I would not delete the old backup set until you've confirmed you no longer need it for recovery.