ReFs.SetFileIntegrity Error (Veeam Support - Case # 03833159)

[BradForr]

I'm not exactly sure where to go for support on this.

We have a new Server 2019 server with 7 VMs on it.
Using Veeam Backup & Replication Community Edition 9.5u4
A rotated USB drive set is planned to be plugged in on a daily basis.

The first USB ran a complete backup and 2 incrimentals without issue while testing. The backups then stopped and we have not been able to get them started again.

We keep getting an error "2019/10/31 08:11:59 :: Processing <backup name> Error: Incorrect function. Agent failed to process method {ReFs.SetFileIntegrity}."

I'm finding a lot of information online about NAS drives, but we are not using a NAS...

[HannesK]

Hello,
and welcome to the forums.

As support cannot help you with community edition, I can only recommend to narrow it down by doing backup to a non-rotated drive. The ReFs.SetFileIntegrity makes me guess that your USB drive is formatted with REFS (we set the FileIntegrity flag if we detect ReFS on the backup target). Can you re-format it? Can you try NTFS? Just to verify whether doing backup is the issue or writing backup to USB disk.

Best regards,
Hannes

[BradForr]

The USB is set to NTFS. The VM storage on the host is ReFs.

It starts the job, builds the list of machines, checks VM size, Changes block tracking state... waits for a few seconds, then spits out the error. It doesn't actually start any data movement.