SATA drives can report temperatures via S.M.A.R.T. I have a Vertex 3 that i've briefly used under linux and it can report temperatures fine on its own without the need for any external temperature sensors. You'd be hard pressed to find a drive that cant.
I see. That sounds good, but..
My understanding is that it's done with internal temperature sensors in the drive itself, combined with Apple Firmware on the drive and a proprietary cable. Each brand of hard drive used has a different proprietary cable and Apple Firmware.
Does that mean the Vertex 3, even though it has the capability, would not be able to report its temp to the system since it's not running Apple firmware?