md_monitor.service

[Unit]
Description=MD device monitor
Wants=systemd-udevd.service
Before=mdmonitor.service 
After=systemd-udevd.service
DefaultDependencies=no
Conflicts=shutdown.target

[Service]
Type=simple
# md_monitor needs one task and one file descriptor per disk (DASD).
TasksMax=65536
LimitNOFILE=65536
# Command line options can be overridden in the environment file below
Environment="MD_MONITOR_ARGS=--expires=5 --retries=2 --check-timeout=1 --fail-mirror"
EnvironmentFile=-/etc/sysconfig/md_monitor
ExecStart=/sbin/md_monitor $MD_MONITOR_ARGS
ExecStop=/sbin/md_monitor --command=Shutdown

[Install]
WantedBy=sysinit.target