hddtemp
ma3@ma3-M68M-S2P:~$ sudo hddtemp /dev/sda
/dev/sda: HDS728080PLAT20: 38°C
ma3@ma3-M68M-S2P:~$ sudo hddtemp /dev/sdb
/dev/sdb: Hitachi HDS721680PLA380: 47°C
ma3@ma3-M68M-S2P:~$
ma3@ma3-M68M-S2P:~$ sudo hddtemp /dev/sda
/dev/sda: HDS728080PLAT20: 38°C
ma3@ma3-M68M-S2P:~$ sudo hddtemp /dev/sdb
/dev/sdb: Hitachi HDS721680PLA380: 47°C
ma3@ma3-M68M-S2P:~$