# /etc/systemd/system/mnt-media-monitor.service
[Service]
Type=oneshot
ExecStart=/usr/bin/systemctl restart mnt-media.mount
[Unit]
Description=Persistent NFS Mount Watcher
After=mnt-media.mount

[Service]
Type=oneshot
ExecStart=/bin/sh -c 'if ! mountpoint -q /mnt/media; then systemctl restart mnt-media.mount; fi'
Nice=19
IOSchedulingClass=idle