File system only mounts with gparted

[MR ZenWiz]

I just updated my Xubuntu 16.04.2 to the latest kernel et al, and when
I rebooted, one of my drives did not mount.  This has happened several
times, but this one was a little different.

I ran mount on it several times - no effect.

I modified /etc/fstab to mount using UUIDs instead of the LABELs I had
been using - still no effect.

I ran a check on the drive with gparted, and it showed up, mounted as
/media/admar/_ttera instead of just /ttera, where it's supposed to be.
I umounted it and tried again - no effect.

I ran fsck on it and it came back clean, so I used gparted again to
mount it, and there it is.

Why would that be - mount doe snot work but gparted does?

Thanks.
MR