title: VirtualBox How to move hard drive from one controller to another
body: <p>Virtual Box SAS storage controller allows faster IO than SATA one:</p>
  
  <blockquote>
    <p>SAS is to SCSI what SATA is to IDE: it allows for more reliable and faster connections.</p>
  </blockquote>
  
  <p>from <a href="https://www.virtualbox.org/manual/ch05.html" rel="nofollow">https://www.virtualbox.org/manual/ch05.html</a></p>
  
  <p>By default new VM is created with hard disk attached to SATA controller (at least for Windows VMs). In order to make IO operations faster in guest system, one might want to move a hard drive to SAS controller.
  How to do that for Windows guest OS without breaking anything?</p>