Q: At start up, loud whirring noise around fan belts on 2005 Honda Civic

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Almost a grinding noise...Alternator?
(1) Answer
Either remove belts and check individual components and pulleys , or carefully use a stethescope to isolate the cause. You say 'at start-up'-----how long does the noise last ? 1 sec. 5 sec. ?