Actually, there were two good entries that explained everything I needed to know about "hardlock."
What's less clear is why, when I searched for that term in the ZTERM forum half an hour ago, I got "no matches."
Now, I run the same search again, and go right to the needed articles.
It seems to me that I've had this problems before: inconsistent results from "search." Is this a problem for other forum users? If not, we'll write it off to my sloppy typing. But if other folks have had similar results, I'd like to document it somewhere...