These instructions explain how to mount a drive permanent with the LuCI administrator interface.

Login to the fstab LuCI interface at LuCI 🠞 System 🠞 Mount points. Scroll down to the Mount points section which might be empty as here:

Click the Add button. On this page click on the “UUID” drop down list and select your new drive:

Then click the “Mount point” drop down list and select “custom”:

You should now chose the mount point. If you want to use your new disk for LXC (Linux Containers) type the name /srv. Finally click the Save and Apply button:

And you are done. After next boot the /srv will be mounted automatically.

Note: The configuration file where the setup is saved can be found at /etc/config/fstab.