Proxmox 9: SMB storage connection error in UI

Phuturist

New Member
Aug 8, 2025
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I did a fresh install of Proxmox 9 after having backed up everything on a connected SMB share on my Proxmox 8.x install. I can reconnect the SMB share in the fresh install of Proxmox 9 an it sees all the available share so the credentials are fine.

But after connecting the share it shows status "Unknown" with a spinning "Connection error ..." message in th UI. When accessing the share through the shell under /mnt/pve/ I can access the share just fine and see it's content. But since the UI keeps telling me Connection error I cant restore my VM's and LXC's?

What could be the issue here?

[EDIT]
I'm seeying the following messages in dsmeg repeated over and over: [ 2716.341239] CIFS: Attempting to mount //192.168.0.xxx/Some/Share

and pvesm status tells me mount error(16): Device or resource busy

but the device is not busy at all.

[EDIT2]
When I disable the share and enable it directly after I can access the share under the UI but seconds after that the connection error returns. When I unmount the share through shell I need to unmount it twice. It is as if Proxmox is continuisly trying to mount the share even when it has been mounted already.
 
Last edited:
I did a fresh install of Proxmox 9 after having backed up everything on a connected SMB share on my Proxmox 8.x install. I can reconnect the SMB share in the fresh install of Proxmox 9 an it sees all the available share so the credentials are fine.

But after connecting the share it shows status "Unknown" with a spinning "Connection error ..." message in th UI. When accessing the share through the shell under /mnt/pve/ I can access the share just fine and see it's content. But since the UI keeps telling me Connection error I cant restore my VM's and LXC's?

What could be the issue here?

[EDIT]
I'm seeying the following messages in dsmeg repeated over and over: [ 2716.341239] CIFS: Attempting to mount //192.168.0.xxx/Some/Share

and pvesm status tells me mount error(16): Device or resource busy

but the device is not busy at all.

[EDIT2]
When I disable the share and enable it directly after I can access the share under the UI but seconds after that the connection error returns. When I unmount the share through shell I need to unmount it twice. It is as if Proxmox is continuisly trying to mount the share even when it has been mounted already.
I have the same error with an NFS mount. I can read/write to it no problem, but it does show "?" - probably just a bug for now.