How to make system wait for network during boot?

[zenzen]

You can use the x-systemd.automount or x-systemd.device-timeout options. Take a look at this thread for some details:

Solution for Automount without fstab

Hey; Lately i face some problems with fstab struggling to mount my backup disks (by-UUID) and disks for virtual machines and cause it can't reach them i face emergency shell. So I'm looking for a solution without using fstab like a shell script executed as autostart when System already is boot-up. It's just normal HDD/SDD so sdX used as external storage so not necessary for boot-up but good to be still mounted as well. I appreciate some tipps, thanks!