Ubuntu – Cannot write on ext4 partition Ubuntu 14.04

ext4mountpartitioningpermissions

I formatted the disk in my computer as ext4. Now I'm trying to make it readable and writable for any user on this computer.
My entries in /etc/fstab look like this

# Data partitions
UUID=f59da30c-a2a8-4cab-97c6-4476453a3a31   /media/data1    ext4    defaults    0   0
UUID=73f1dad6-dcc4-4d12-996b-5e62406e7881   /media/data2    ext4    defaults    0   0

After mounting I also changed the owner of the mounted drives and gave rw permissions to every user as shown below. However other users still cannot write to that partition.

$ sudo mount -a 
$ sudo chown -R :users /media/data* 
$ sudo chmod -R g+rw /media/data* 
$ cd /media/data1/
$ touch test 
touch: cannot touch ‘test’: Permission denied


$ ll
total 20
drwxr-xr-x   5 root root  4096 Mär 18 19:13 ./
drwxr-xr-x  23 root root  4096 Mär 18 19:11 ../
drwxr-x---+  2 root root  4096 Dez 15 18:15 cvg/
drwxrwxr-x   2 cvg  users 4096 Mär 18 19:18 data1/
drwxrwxr-x   2 cvg  users 4096 Mär 18 19:18 data2/

(what is strange is that data1 and data2 are not highlighted green in bash after mounting, which was the case when I mounted patitions on other computers).

I already did this on another computer so I don't understand what I did wrong this time :(.

Best Answer

  • Is current user in your group "users" ? Try groups command. If its not, than use sudo adduser USER-NAME users and then reload your session.
  • Isn't /media/data1/test file already there (owned by someone else)? Try ll /media/data1/test.
  • Are those partitions mounted without any restrictions? Try mount|grep /media/data command.

Mind to share outputs of these?

P.S. In your /etc/fstab you set last parameter to 0, meaning the drives wont be checked by fsck at system start when needed, are you OK with this?

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