I’m running a Ubuntu server on my old laptop with an external HDD connected to it. The external HDD is powered independently from the laptop, as it is plugged into the wall.
During a power outage, my laptop remains operational due to its battery, but the HDD shuts down. When power is restored, my laptop does not automatically remount the HDD, and I have to reboot the system manually to access it.
Does anyone know how I can resolve this issue?


Remove the laptop battery.
/jk
I used to have a similar setup and the disk didn’t last a year. All those power losses are going to break the disk eventually. Now I’m trying a cheap UPS.