UUID=8aecacf9-b6db-4c9b-9b46-50172a283484   /mnt/backupdisk   ext4    defaults,nofail    0   2
sudo mount -a
df -h | grep /mnt/backupdisk

#
# /etc/fstab
# Created by anaconda on Wed Aug 15 19:30:54 2018
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
UUID=12907c8a-6b2f-4981-b94c-f3cd772270a7	/	xfs	defaults,uquota	0	0
UUID=fa2f8157-21c9-43b6-85e3-ff04422dfa00 /boot                   xfs     defaults        0 0
/usr/tmpDSK             /tmp                    ext3    defaults,noauto        0 0
xxxx

UUID=8aecacf9-b6db-4c9b-9b46-50172a283484   /mnt/backupdisk   ext4    defaults,nofail    0   2