title: what can cause high buffer i/O on my client's server?
body: <p>I've got a client's SQL Server with high <strong>Buffer I/O</strong>.</p>
  
  <p>I have checked long running queries, added new indexes, and there are no locks on the server. Is it a disk issue? </p>
  
  <p>Here are the detail of the waits on the <strong>Activity Monitor</strong>:</p>
  
  <p><a href="https://i.stack.imgur.com/EVXdt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EVXdt.png" alt="enter image description here"></a></p>