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Revision as of 08:42, 25 February 2014 by Siot (talk | contribs) (Daemon: Changed to use systemd overrides)
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hddtemp is a small utility (daemonizable) that gives you the temperature of your hard drive by reading S.M.A.R.T. information (for drives that support this feature).


Sync and install with pacman:

# pacman -S hddtemp


Hddtemp can be invoked with the drive as the argument:

# hddtemp /dev/sd[x]

Where x is the drive.


Running the daemon gives you the possibility to access the temperature via an TCP/IP request, so you could use this in order to check the temperature from outside, or within some scripts.

Once hddtemp has been installed, standard systemctl procedures work to start the daemon:

# systemctl start hddtemp

To start it on boot, enable it:

# systemctl enable hddtemp
Note: Arguments to hddtemp are directly given in /usr/lib/systemd/system/hddtemp.service. This is especially important if you have multiple disks, because in the default configuration only /dev/sda is monitored. Change the ExecStart overriding the hddtemp.service file:
  • Create the directory on /etc/systemd/system:
# mkdir /etc/systemd/system/hddtemp.service.d
  • Create a customexec.conf file inside adding the drives you want to monitor, e.g.:
ExecStart=/usr/bin/hddtemp -dF /dev/sda /dev/sdb /dev/sdc
  • Reload systemd's unit files:
# systemctl --system daemon-reload
  • Restart hddtemp service:
# systemctl restart hddtemp


Another way to get the temperature is by connecting to the daemon which is listening on port 7634.

$ telnet localhost 7634

Or with netcat:

$ nc localhost 7634

Refer to the manpage for information like supported drives, logging, etc.

$ man hddtemp


Hddtemp can be easily integrated with system monitors like Conky, the sensors-applet for GNOME Panel or the xfce4-sensors-plugin for Xfce Panel.

See also

lm sensors