OK, so I was gifted a Mac Plus a couple weeks ago, and finally got it up and running a couple days ago (had to wait for mouse and a couple lots of disks for it to arrive, since it came as just the Mac and keyboard).
The first batch of disks worked fine and I spent a good afternoon testing things out, flipping things back and forth as requested, etc.
The second batch arrived today, and it took a bit of a different course. I put in the first disk of the Microsoft Word 5.1 install set and it read it fine. Not having an HD for the Mac at present I decided not to run the installer, but I thought I'd put disk 2 in to see how it came up.
It came up with a message that the disk needed minor repair, and offered to do it. I said sure, and accepted the offer to repair the disk, which it ejected thereafter.
From there on every disk I inserted would be greeted with a message "This disk cannot be read" along with an offer to eject the disk or reformat it as a one- or two-sided disk. Even the System 6.0.8 disk I booted that session with produced this when I put it back in.
Even after a restart it's still rejecting any disk I put in there, including known good boot disks.
Did I just watch the disk drive fail in real time, or is there something else that might be in play? Looking for suggestions on what to do next.