desktop ~ # hddtemp /dev/sd?
Segmentation fault
desktop ~ # hddtemp /dev/sda
WARNING: Drive /dev/sda doesn't appear in the database of supported drives
WARNING: But using a common value, it reports something.
WARNING: Note that the temperature shown could be wrong.
WARNING: See --help, --debug and --drivebase options.
WARNING: And don't forget you can add your drive to hddtemp.db
/dev/sda: WDC WD740GD-00FLA1:  33°C or °F
desktop ~ # hddtemp /dev/sdb
WARNING: Drive /dev/sdb doesn't appear in the database of supported drives
WARNING: But using a common value, it reports something.
WARNING: Note that the temperature shown could be wrong.
WARNING: See --help, --debug and --drivebase options.
WARNING: And don't forget you can add your drive to hddtemp.db
/dev/sdb: Maxtor 6B200M0:  32°C or °F