Failing to mount a share, undetected SMB version

[tommy84cz]

Hi, I'm trying to mount a share in the File Browser app. I've tried different settings, but the mount always fails with the bellow information.

Mounting network share(s)...
... using domain WORKGROUP
... mounting (cifs) //192.168.0.1/g
[19:49:45] WARNING: ...... EINVAL (22): trying SMB dialect ladder (3.x -> 2.x).
[19:49:45] WARNING: ...... still failing after vers ladder; retrying with reduced CIFS options.
...... 192.168.0.1 is confirmed reachable
...... credentials are valid
...... SMB version : couldn't detect, falling back to SMB3->SMB2 ladder on EINVAL
[19:49:47] FATAL: Error, unable to mount //192.168.0.1/g to /mnt/g with username admin. Please check share path, username/password/domain; try UID/GID 0.
[19:49:47] FATAL: Here is some debugging info :
Protocol negotiation to server 192.168.0.1 (for a protocol between SMB2_02 and SMB3) failed: NT_STATUS_CONNECTION_DISCONNECTED
[19:49:47] FATAL: Error read : mount error: Server abruptly closed the connection.
This can happen if the server does not support the SMB version you are trying to use.
The default SMB version recently changed from SMB1 to SMB2.1 and above. Try mounting with vers=1.0.
mount error(112): Host is down
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages (dmesg)
mount: mounting //192.168.0.1/g on /mnt/g failed: Host is down, addon will stop in 1 min
...... 192.168.0.1 is confirmed reachable
...... credentials are valid
...... SMB version : couldn't detect, falling back to SMB3->SMB2 ladder on EINVAL
[19:49:47] FATAL: Error, unable to mount //192.168.0.1/g to /mnt/g with username admin. Please check share path, username/password/domain; try UID/GID 0.
[19:49:47] FATAL: Here is some debugging info :
Protocol negotiation to server 192.168.0.1 (for a protocol between SMB2_02 and SMB3) failed: NT_STATUS_CONNECTION_DISCONNECTED
[19:49:47] FATAL: Error read : mount error: Server abruptly closed the connection.
This can happen if the server does not support the SMB version you are trying to use.
The default SMB version recently changed from SMB1 to SMB2.1 and above. Try mounting with vers=1.0.
mount error(112): Host is down
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages (dmesg)
mount: mounting //192.168.0.1/g on /mnt/g failed: Host is down, addon will stop in 1 min

I'm able to mount the share in Music Assistant app when I select specifically SMB version 2.0. Is it possible to specify and use and older SMB version in File Browser? The same thing happens in the Nextcloud app as well.

Thanks

[alexbelgium]

Hi, I’ve tried updating the code with automatic detection please let me know how that goes

[tommy84cz]

Thanks. I updated to the new version and tried again. It still fails, although it now tries more times and the debugging information changed.

Starting custom scripts
/etc/cont-init.d/00-banner.sh: executing
-----------------------------------------------------------
 Add-on: Filebrowser
 filebrowser provides a file managing interface within a specified directory and it can be used to upload, delete, preview, rename and edit your files
-----------------------------------------------------------
 Add-on version: 2.57.1
 You are running the latest version.
 System: Home Assistant OS 17.1
 Architecture: aarch64 / raspberrypi5-64
 Home Assistant Core: 2026.2.1
 Home Assistant Supervisor: 2026.02.1
-----------------------------------------------------------
 Provided by: https://github.com/alexbelgium/hassio-addons 
-----------------------------------------------------------
/etc/cont-init.d/00-global_var.sh: executing
[07:12:07] NOTICE: Converting addon options to environment variables
[07:12:07] NOTICE: Supports custom env_vars
[07:12:07] NOTICE: https://github.com/alexbelgium/hassio-addons/wiki/Add-Environment-variables-to-your-Addon-2
NoAuth=true
certfile=fullchain.pem
disable_thumbnails=true
keyfile=******
ssl=false
cifsdomain=WORKGROUP
cifspassword=******
cifsusername=admin
networkdisks=//192.168.0.1/g
/etc/cont-init.d/00-local_mounts.sh: executing
[07:12:07] NOTICE: This script is used to mount local USB/SATA/SD/NVMe drives. Instructions here : https://github.com/alexbelgium/hassio-addons/wiki/Mounting-Local-Drives-in-Addons
---------------------------------------------------
[07:12:07] INFO: Available Disks for mounting :
NAME        LABEL   SIZE FSTYPE RO
---------------------------------------------------
Supported fs :  ext3 ext2 ext4 squashfs vfat msdos f2fs erofs fuseblk
Inspired from : github.com/dianlight
---------------------------------------------------
/etc/cont-init.d/00-smb_mounts.sh: executing
[07:12:07] NOTICE: This script is used to mount remote smb/cifs/nfs shares. Instructions here : https://github.com/alexbelgium/hassio-addons/wiki/Mounting-remote-shares-in-Addons
Mounting network share(s)...
... using domain WORKGROUP
... mounting (cifs) //192.168.0.1/g
[07:12:07] WARNING: ...... CIFS negotiation/dialect failure: trying SMB dialect ladder (3.x -> 2.x).
[07:12:07] WARNING: ...... still failing after vers ladder; retrying with reduced CIFS options.
...... 192.168.0.1 is confirmed reachable
...... credentials are valid
...... SMB version : couldn't detect, falling back to SMB3->SMB2 ladder on negotiation/dialect failure
[07:12:09] WARNING: ...... CIFS negotiation/dialect failure: trying SMB dialect ladder (3.x -> 2.x).
[07:12:09] WARNING: ...... still failing after vers ladder; retrying with reduced CIFS options.
[07:12:09] FATAL: Error, unable to mount //192.168.0.1/g to /mnt/g with username admin. Please check share path, username/password/domain; try UID/GID 0.
[07:12:09] FATAL: Here is some debugging info :
	Sharename       Type      Comment
	---------       ----      -------
	G               Disk      
	IPC$            IPC       IPC Service (samba server)
SMB1 disabled -- no workgroup available
[07:12:09] WARNING: ...... CIFS negotiation/dialect failure: trying SMB dialect ladder (3.x -> 2.x).
[07:12:09] WARNING: ...... still failing after vers ladder; retrying with reduced CIFS options.
[07:12:09] FATAL: Error read : mount error: Server abruptly closed the connection.
This can happen if the server does not support the SMB version you are trying to use.
The default SMB version recently changed from SMB1 to SMB2.1 and above. Try mounting with vers=1.0.
mount error(112): Host is down
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages (dmesg)
mount: mounting //192.168.0.1/g on /mnt/g failed: Host is down, addon will stop in 1 min
[07:12:09] FATAL: Here is some debugging info :
	Sharename       Type      Comment
	---------       ----      -------
	G               Disk      
	IPC$            IPC       IPC Service (samba server)
SMB1 disabled -- no workgroup available
[07:12:09] WARNING: ...... CIFS negotiation/dialect failure: trying SMB dialect ladder (3.x -> 2.x).
[07:12:09] WARNING: ...... still failing after vers ladder; retrying with reduced CIFS options.
[07:12:09] FATAL: Error read : mount error: Server abruptly closed the connection.
This can happen if the server does not support the SMB version you are trying to use.
The default SMB version recently changed from SMB1 to SMB2.1 and above. Try mounting with vers=1.0.
mount error(112): Host is down
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages (dmesg)
mount: mounting //192.168.0.1/g on /mnt/g failed: Host is down, addon will stop in 1 min