I have a home NAS accessed via smb share.
I used ubuntu 16.04 before and everythings fine. After I changed to 18.04, (not upgrading but erase-and-installing a new system, with the /home mounted at a different drive so not changed), It seems fine until I found all the folders in the NAS can only be read, any write operation will give an error.
I installed Xubuntu 18.04 first, when I tried to create a new folder in a NAS folder, the error message is :
Fail to create directory "New Folder". Function not implemented. Do you want to skip it?
I tried Ubuntu 18.04 and get the same. And if I re-install the system with 16.04, the problem is gone.
I searched internet but couldn't find the answer. I found 16.04 and 18.04 have different cifs module versions, 16.04's cifs.ko is V2.08, while in 18.04 it's V2.10, is this the cause ? how to fix it?
If I mount the NAS folder by command line using:
sudo mount.cifs -o user=username,pass=mypwd //192.168.1.254/Documents /mnt
it can mount correctly, buy when I try to create a new file or folder in /mnt , I got this error:
mn$ mkdir sjk mkdir: cannot create directory ‘sjk’: Operation not supported
mnt>$ touch test touch: cannot touch 'test': Operation not supported
Can anybody help with it?