noauto option ignored in /etc/fstab?

[Tom H]

On Fri, Dec 1, 2017 at 2:50 AM, Josef Wolf <jw at raven.inka.de> wrote:
>
> I have the following line in /etc/fstab:
>
> UUID=XXXX-XXXX-XXXX-XXXX /boot ext4 noauto,relatime 0 2
>
> The noauto option should prevent the fs to be mounted during boot.
>
> That worked great in every distro I have touched in the last 20 years.
>
> But since I reinstalled this box with 16.04 LTS, this FS is mounted during
> boot.
>
> Any ideas what causes this FS to be mounted during boot?

Is this an EFI system?

If it is, you'll have to set "/boot/efi" as "noauto" too.