I’ve got an entry for an external harddrive in my fstab:

UUID="680C0FE30C0FAAE0" /jgdata ntfs noatime,rw

But sometimes this drive isn’t plugged in at boot time. This leaves me half way through a boot, with a prompt to “Continue Waiting, press S or press M” but no keypress has any affect at this stage (including Ctrl–Alt–Delete, not even caps-lock).

Short of writing a script to check the output of fdisk -l, how can I mount this drive at boot time only if it is present? It would be handy to have an fdisk entry for this drive, so I can just type mount /jgdata instead of needing a device name.

Source: Mount an external drive at boot time only if it is plugged in – Ask Ubuntu