We had an old content db that was not mounted and tried to take it offline. When we did it returned service account login errors. I am wondering why these errors are happening because this content db is not attached to a site collection.
The only other thing is that our current web app uses the same service account name but I don't see how that would have any bearing on a completely different content db with a different name. We want to take the db offline and see then see if we need to keep it however it is throwing these errors.