Skip to main content
Question

Permissions Denied on one backup to repository allowed by others

  • November 11, 2025
  • 14 comments
  • 49 views

Hi,

I have a few backups running to a Repository on an NAS, shared by nfs3://[IP ADDX]/Backups/etc…

It works fine for my esxi backups. I’m trying too backup a hyper-V VM and and getting the below message. It does succeed in creating as folder in the repository for the packup to go, and the permissions are are same as the others, so I’m not sure what credentials its trying to use since it’s writing to the same place that works for other backup jobs:

“… Processing … Error: Failed to reset previous connection exception: Permission denied
Failed to open storage for read/write access. Storage: [target path] ....
Agent failed to process method {Stg.OpenReadWrite}.
  “

I’m not sure if this means it can’t read the source or can’t write the target. If the former, what do I have to do because use a local admin to access the source? If the letter, why can this job not write to the repository when other jobs can?

Thanks, 

14 comments

Tommy O'Shea
Forum|alt.badge.img+5
  • Veeam Legend
  • 359 comments
  • November 11, 2025

With ESXI backups, the proxy in use could be the Veeam server, or other Veeam proxies you may have configured. With Hyper-V backups, the proxy is sometimes the Hyper-V host itself.

Does the Hyper-V host the VM is sitting on have access to the NFS repository via these ports?


  • Author
  • New Here
  • 6 comments
  • November 11, 2025

Thanks. I made sure file/printer sharing was on and can get out to the NAS from the HyperV host. I have full read/wrote permissions from the HV to the NAS, and from the Veeam server to the NAS, yet I’m still getting these errors.


Tommy O'Shea
Forum|alt.badge.img+5
  • Veeam Legend
  • 359 comments
  • November 11, 2025

Could you do some isolation testing? Can you set up another repository, perhaps on disk, and back up a small hyper-v VM to it? If it works, that points to the connection to the NAS as the issue. If it doesn’t, then the issue is reading from Hyper-V.


  • Author
  • New Here
  • 6 comments
  • November 11, 2025

OK backing up locally seems to work. I’m not sure why it won't backup to the NAS when both Veeam and hyperV have R/W access to it. The repository was originally defined to use nfs3 which works well for when backing up VMWare VMs, but I’ve tried both that and smb and get errors, even though I can see the backup flles from the HV server.


Tommy O'Shea
Forum|alt.badge.img+5
  • Veeam Legend
  • 359 comments
  • November 11, 2025

Can you check to see if the Hyper-V hosts are added to Veeam configured to use On-Host or Off-Host backup?

Try switching between them to see if there is any difference. Here is how to add an Off-Host backup proxy.

 


  • Author
  • New Here
  • 6 comments
  • November 11, 2025

This is a new error when trying to backup over smb:

“...Error: Incorrect function. Agent failed to process method {ReFs.SetFileIntegrity}.”
 

 


Tommy O'Shea
Forum|alt.badge.img+5
  • Veeam Legend
  • 359 comments
  • November 11, 2025

Did you switch the proxy type resulting in the new error?

 

By the way, if you haven’t already, I recommended creating a case with Veeam support who can dig into the logs and help you out. They may be better equipped to look up the errors you’re getting.


  • Author
  • New Here
  • 6 comments
  • November 11, 2025

Found a registry Change that fixed the above setfileintegrity error for some, but didn't work.


  • Author
  • New Here
  • 6 comments
  • November 11, 2025

Did you switch the proxy type resulting in the new error?

 

By the way, if you haven’t already, I recommended creating a case with Veeam support who can dig into the logs and help you out. They may be better equipped to look up the errors you’re getting.

Thanks I’ll try. Didn’t even occur to me since I’m using the free version.


Tommy O'Shea
Forum|alt.badge.img+5
  • Veeam Legend
  • 359 comments
  • November 11, 2025

Thanks I’ll try. Didn’t even occur to me since I’m using the free version.

Yep, they will still provide support, it will just be “Best Effort” from them rather than holding to a strict SLA.


Forum|alt.badge.img+3
  • Comes here often
  • 192 comments
  • November 12, 2025

Found a registry Change that fixed the above setfileintegrity error for some, but didn't work.

What did you set? I’m a bit surprised that an NFS share threw a ReFS Integrity Check error. Can you confirm:

 

  1. It’s really an NFS repository?
  2. Can you post a screenshot of the current error from the UI?
  3. What is the config parameter you set for the above?

lukas.k
Forum|alt.badge.img+12
  • Veeam Vanguard
  • 363 comments
  • November 12, 2025

On which layer did you set the permissions? On the file system of the target repo or on the Veeam repo within VBR?


  • Author
  • New Here
  • 6 comments
  • November 12, 2025

Found the problem. The separate LAN I use for backups wasn’t configured right on the HV host, and when testing I didn’t notice I was just connecting through the regular LAN. Once I remade the LAN I want to use it could find the IP and get to the repository. I guess Veeam reports “no network” as a permissions error. Thanks.


Tommy O'Shea
Forum|alt.badge.img+5
  • Veeam Legend
  • 359 comments
  • November 12, 2025

Glad to hear you were able to solve the issue. When you’re able, please select a comment as “Best Answer”, even if it is your own.