title: EBS not showing correct disk size in amazon web service
body: <p>I created a new xtra large EC2 machine with 300 GB EBS volume attached to the root</p>
  
  <p>When the instance properties are viewed in the EC2 panel it shows 
  <code>Root Device: /dev/sda1</code> which is connected to an <code>EBS ID</code> correponding to an <code>EBS volume</code> with capacity <code>300GB</code></p>
  
  <p>but df -h shows the size to be 50 GB</p>
  
  <pre><code>Filesystem            Size  Used Avail Use% Mounted on
  /dev/sda1              50G   18G   30G  38% /
  none                  7.5G  3.6G  4.0G  48% /dev/shm
  </code></pre>