This video talks about how to remount drives on your Raspberry Pi (or any Linux distro) automatically, to solve the intermittent issue some have with drive mounts dropping and not re-mounting.
This is a follow up video from the NAS hosting video, where I show how to host a home based NAS system using a Raspberry Pi and an external hard disk drive.
Personally I find my NAS mounts occasionally drop, and its a real pain if that has happened when I come to connect from another device, so I wrote a script to solve that problem and I talk through that here.