Permissions of www-data on an addtional drive on Ubuntu 14.04

Question

I'm trying to give rwx permissions to www-data in /media/bblab/Database/data to install OwnCloud.

bblab is my user name and Database is my disk label. The step I mount the drive is:

1. login as bblab (the user created when I installed Ubuntu)

2. open disk application and find an empty drive /dev/dm-2 (hard drive 2T*2 installed on motherboard with hardware RAID 1 (Gigabyte X79-UP4))

3. create a new partition on drive /dev/dm-2 and the partition is named /dev/dm-3

4. mount the partition /dev/dm-3 at /media/bblab

5. use terminal to change the permission of the media to 750

6. add group www-data to /media/bblab/Database

7. sudo chown -R www-data:www-data /media/bblab/Database/data

and now when use command ls -al /mdeia/bblab/Database, the result is

drwxr-x--- bblab www-data .
drwxr-x--- root root ..
drwxrwx--- www-data www-data data
drwx------ root root lost+found

But OwnCloud still gives the following messages:

Can't create data directory (/media/bblab/Database/data/data)

This can usually be fixed by giving the webserver write access to the root directory.

Is there any step I'm doing wrong or have forgotten to do? Thanks!

Solution

What worked on my end:

sudo chown -R www-data:www-data /path/to/ownCloud 
sudo chmod -R 775 /path/to/ownCloud
sudo adduser YOURNAME www-data

Voila!

for ownCloud to work well, www-data must be the one that own all of that folders with both Read and Write. It's just that how it works.

That application running so smoothly with that approach I used.