How to check drive temperature on Linux?

I like hddtemp, which provides a pretty standard way of getting the temperature for supported devices. It requires SMART support though.

Example Usage: sudo hddtemp /dev/sd[abcdefghi]

Example Response:

/dev/sda: WDC WD6401AALS-00J7B0: 31°C
/dev/sdb: WDC WD7501AALS-00J7B0: 30°C

All SMART-capable devices should respond to smartctl. And I guss that only smart-devices have a temperature reading.

All other tools will propably be more or less vendor-specific (like Dell`s omsa). IPMI might be another generic approach, but I doubt, that a temperature-reading of a storage-device is standard there.

As mentioned by Rovanion, to list all drives in one go:

hddtemp /dev/sd?

Or, if you prefer a for loop:

for i in /dev/sd[a-z]; do hddtemp "$i"; done