[Unit]
Description=Mirror /srv/nfs/anca-elements to /mnt/backup (single-disk-failure protection)
After=network-online.target local-fs.target
Wants=network-online.target

[Service]
Type=oneshot
ExecStart=/usr/local/bin/anca-elements-mirror
StandardOutput=journal
StandardError=journal
SyslogIdentifier=anca-elements-mirror
# Big sustained IO — don't compete with foreground services.
Nice=10
IOSchedulingClass=idle
TimeoutStartSec=18000