Monitor temperatures and/or fan speed

Is there any way to monitor the system temperatures, drive temperatures, fan speed, etc. on my Drobo 5N? I just had it do a weird thing, the fan ramped up to super-get-it for a bit and then the Drobo spontaneously rebooted. When it came back the fan was back at normal (almost can’t hear it) speeds and the unit says everything is OK. I was doing a lot of writing to the Drobo prior to the crash, but it rebooted in just a couple of minutes so it couldn’t have gone from “need full fan” to “need very little fan” in the couple of minutes it was recycling.

I do have DropBear running so a command-line option could work as well.

Help?