[dnanian]

The easiest way to tell what the current startup disk is is to look at the top of the drive in Finder. The startup disk has special icons for Applications (and some other folders): other drives do not.

We don't let you copy *to* the startup drive, so that's not going to be a problem. Also, if a clone is on a FireWire drive, it will have a FireWire styled icon, rather than a "standard" one (as long as you haven't set your own custom icon).

Along those lines, you could also use a special icon to identify the drive.

Name changes won't affect your smart update, etc. It's only when *booting* from a drive that the name makes a difference... and then only if the original drive is available when the system is running.