There's lots of good info here. But your dev/sys fs advice begs the question: "how do I know which physical disk has a partition with this uuid". Which is what I asked in the first place.

@djeikyb That's actually one of the things that I was solving while working on the indicator I mentioned, and udisksctl is probably simplest approach - you can filter it with grep for the device + UUID lines. I'll edit it into my question. As for custom solutions, that of course it can be scripted with perl or python or even shell script, where you traverse /dev/disk/by-id and match it with symlinks in /dev/disk/by-uuid.

So if I have several hd, and I know some are Samsung, some are Toshiba, but I can't physically see the label to tell which is which, those parts of your answer don't help.

@djeikyb So, you basically want to know which connectors are used by which drive , right ? and without knowing the model or the hard drive ?

More or less, though connectors are means to an end, not themselves the point. You might read the winning answer.

@djeikyb I've read that, and they focus on the serial number of each disk . . .which is what I also provided in udisksctl status part.

@djeikyb Interesting. Default Disks Utility, palimpset, has apparently been renamed as gnome-disks-utility, but it doesn't have the "Location" anymore. At least not in 16.04 that I'm running