title: hdparm and disk read speed
body: <p>My <code>hdparm -t</code> buffered disk reads output is around 120 MB/sec. However, I was writing a little code that involves reading a big file (around 400MB), when I managed to read it all in about one second (<code>fread()</code> on <code>c</code>). Does the hdparm output not quite say what I understand? Why am I able to read so much faster?</p>
  
  <p>I do very simple processing to the bytes I read, counting how many are the letter 'A'.</p>