I have Unraid 7.0.1 running on a Dell T440. I have Debian 12 running as a VM in Unraid.

Debian boots off an SSD configured in Unraid as a Cache.

I want the primary file system for Debian to be on the array. It all works as expected, except I do not have read/write access.

I have created a Share in the array called "linux" and set it as Private under SMB

I have a user for the linux VM and have given it read/write permission for the linux share.

I have mounted the share in the linux vm by adding this line to fstab:

//T440.local/linux /mnt/linux cifs rw,relatime,vers=3.1.1,credentials=/etc/samba/servershare.conf,uid=0 0 0


/etc/samba/servershare.conf contains the credentials.

When I access /mnt/linux from the linux vm, it is read-only.

I can access the linux share on the unraid array as read/write from a Windows machine. I copied some files to the linux share for testing.

When I list the files in the linux share from the linux vm (ls /mnt/linux), they show user and group as "root".

When I list the files from an SSH terminal in Unraid, the user is the Windows username and the group is "users".

I tried sudo chown to change the files to the linux user name, but it has no effect.

How can create a Linux filesystem on my Array with read/write access for my Debian 12 VM ?

Edited May 24, 20251 yr by timg11

I think I figured it out. The uid was incorrect.

This line in fstab appears to work:

//T440.local/linux /mnt/linux cifs rw,credentials=/etc/samba/servershare.conf,uid=1000 0 0


Using UID=0 means root, which does not seem to allow R/W.

UID=1000 is the first user on the Debian system, which then shows files on the share as:

-rwxr-xr-x 1 debianuser root 6 May 24 11:36 test1.txt


If you want it to work with Samba/SBM, you need the 'Group' to be "users" and the permissions should be 666 for files and 777 for directories. (Your having the execute bit set on a text file is not a good practice from a Linux security standpoint!) See here:

https://forums.unraid.net/topic/188600-share-permissions-changed-to-owner-99/#findComment-1540351

Your owner, debianuser, is fine for SMB access as Unraid as every Share access user setup using Unraid GUI is a member of 'users'. However, if there are files in these shares written by something besides your VM, you will have to make sure that your Debian user is a member of the Unraid group 'users' if you want access to those files via your VM. (In a secure SMB environment, SMB access to files is via the group permissions rather than through the owner!)

I do not use VM's so I can not provide more information then this.

One more thing, 'root' is is invalid user in SMB (security issues),