[Unit]
Description=Monthly random read-back of OneDrive files from router disk (sha256)
Wants=network-online.target
After=network-online.target
RequiresMountsFor=/mnt/backup

[Service]
Type=oneshot
# ждёт, если идёт router-backup (общий lock), а не падает
ExecStart=/usr/bin/flock /run/lock/router-backup.lock /usr/local/bin/router-backup sample
ExecStopPost=/usr/local/bin/backup-metrics backup_router_sample
Nice=10
IOSchedulingClass=idle
TimeoutStartSec=6h