title: Why do we need secondary data files in SQL Server?
body: <p>I always ignore this option when creating a new database on SQL Server 2005, simply because we can ignore something that we do not understand and leave it as it is. (I'm not so into DBA)</p>
  
  <p>so now I am curious what it is about.</p>
  
  <p>From your experience, when do you think we need to add secondary data files to my database and why do we need it?</p>