Adobe can't seem to resolve this so I'll try the brain trust here:
eg: I have all images referenced on a drive called "photo". I also have a clone called "photo mirror".
for a while I had to run off of the mirror- "photo" drive went to the place all drives go to when they get old and grey. No problem, I just changed the name of the mirror to "photo" and all the references in Lr were maintained. Everything intact.
However, on import it is another story, every import creates an additional entry in the Lr Library sidebar, same drive name, same capacity, same total free status indicators, etc, just another "photo" drive. It won't see the new drive as the same drive. Why it will recognize it for existing pics and not for new imports is a mystery.
has anyone every renamed their drive entirely and then reconnected the whole shebang with "find missing"- we are talking 400gb and 25,000 pics...