It's either not intuitive or not working in Ubuntu 14.04.

I want to mount my internal HDD at at startup (I boot from an SSD). I attempt to set this, following this procedure:

1. Open Disks utility
2. Select the disk
3. Below the disk's Volumes, click on the More actions button
4. Select Edit Mount Options...
5. Select Automatic Mount Options "Off"
6. Under Mount Options, ensure that Mount at startup is selected
7. Click OK
8. Enter password into Authenticate dialog box
9. Restart

but this procedure doesn't work. Upon rebooting, and after Grub attempts to start Ubuntu, I receive the error message "An error occurred while mounting /mnt/4f721fc0-8072-453f-b48f-ca686bd89549. Press S to skip mounting or M for manual recovery". That identifier "4f721fc0-8072-453f-b48f-ca686bd89549" was automatically assigned by Ubuntu.

I press S and the boot process continues OK. If I try to mount the disk immediately after booting, I receive the error message "Unable to access "Storage"" (I named the volume Storage).

So then I start the Disks utility and set it to Automatic Mount Options "On" and reboot.

To me, it seems like this should work, but it doesn't.

Here are a number of photos of the process (Alt+PrtScn doesn't work after selecting More actions).