[Unit]
Description=Sync logs to disk before shutdown
DefaultDependencies=false
Before=shutdown.target reboot.target halt.target
Conflicts=shutdown.target reboot.target halt.target

[Service]
Type=oneshot
RemainAfterExit=true
ExecStart=/bin/sh -c 'rsync -aXv --delete --exclude="*.hdd" /var/log/ /var/log.hdd/ 2>/dev/null || true'
TimeoutStopSec=30

[Install]
WantedBy=shutdown.target reboot.target halt.target