root@xx:~# systemctl status smartmontools
● smartd.service - Self Monitoring and Reporting Technology (SMART) Daemon
   Loaded: loaded (/lib/systemd/system/smartd.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2021-01-14 22:06:02 CET; 9min ago
     Docs: man:smartd(8)
           man:smartd.conf(5)
 Main PID: 1127 (smartd)
   Memory: 1.4M
   CGroup: /system.slice/smartd.service
           └─1127 /usr/sbin/smartd -n --quit=never --interval=1800

Jan 14 22:06:02 DK systemd[1]: Started Self Monitoring and Reporting Technology (SMART) Daemon.
Jan 14 22:06:02 DK smartd[1127]: smartd 6.6 2017-11-05 r4594 [armv7l-linux-4.14.212-odroidxu4] (local build)
Jan 14 22:06:02 DK smartd[1127]: Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
Jan 14 22:06:02 DK smartd[1127]: Opened configuration file /etc/smartd.conf
Jan 14 22:06:02 DK smartd[1127]: Configuration file /etc/smartd.conf parsed.
Jan 14 22:06:02 DK smartd[1127]: Device: /dev/disk/by-id/ata-ST4000VN008-2DR166_ZDH6VJKY [SAT], open() failed: No such device
Jan 14 22:06:02 DK smartd[1127]: Device: /dev/disk/by-id/ata-ST4000VN008-2DR166_ZDH6VJKY, not available
Jan 14 22:06:02 DK smartd[1127]: Monitoring 0 ATA/SATA, 0 SCSI/SAS and 0 NVMe devices