I ran the SMART utilities:
SMART status is ok.
SMART short self-test ran about 5 seconds and reported failed, 7 (unknown error)
SMART extended self-test ran about 5 seconds and reported failed, 7 (unknown error).
I'm going to work on the manufacturer's utilities now and I'll report back. Seems clear the SMART self-tests didn't really run. Any idea what a 7 (unknown error) failure might mean?