title: Swap disappears when stopping an ebs backed instance.
body: <p>My instance swap file is disappearing when I start my instance. </p>
  
  <p>I have an Ubuntu ec2 instance, and I follow the "Four-step Process to Add Swap File" instructions at <a href="https://help.ubuntu.com/community/SwapFaq" rel="nofollow">https://help.ubuntu.com/community/SwapFaq</a>: </p>
  
  <pre><code>sudo dd if=/dev/zero of=/mnt/512MiB.swap bs=1024 count=524288
  sudo chmod 600 /mnt/512MiB.swap
  sudo mkswap /mnt/512MiB.swap
  sudo swapon /mnt/512MiB.swap
  </code></pre>
  
  <p>I then changed my /etc/fstab to include:</p>
  
  <pre><code>/mnt/512MiB.swap  none  swap  sw  0 0
  </code></pre>
  
  <p>Since I am using a much bigger swap, this process takes some time, and I don't want to do it every time I start. I would rather pay for the storage. However, when I start my instance, the swap has disappeared. If I type 'top', the instance does not have a swap file in use. </p>
  
  <p>What should I do?</p>