title: How to extend storage in Swift(OpenStack) service?
body: <p>I installed a SAIO(swift all in one) in my server, it's a ubuntu 14.04 system.</p>
  
  <p>I create a loopback device for storage by following commands:</p>
  
  <p><code>sudo mkdir /srv
  sudo truncate -s 20GB /srv/swift-disk
  sudo mkfs.xfs /srv/swift-disk
  </code>
  (<a href="http://docs.openstack.org/developer/swift/development_saio.html" rel="nofollow noreferrer">http://docs.openstack.org/developer/swift/development_saio.html</a>)</p>
  
  <p>Now, I don't have enough disk to storage, I want to extand swift storage, what can I do for it?</p>