title: How does the CanBeSystemVolume function work during unattended installation
body: <p>In my case I'd like to modify the "unattend.xml" file to install OS to the disk which supports installation. </p>
  
  <p>Setting fixed disk index implicates setting up boot options which is not the prefered when you change disks very often and you actually want the installation to be unattended. </p>
  
  <p>During the unattended installation in Windows PE the installer is executing the function called <code>CanBeSystemVolume</code>. This seems to be the solution for my problem but I can't find the definition of it anywhere. Looking for a way to detect possible system volume also gave me no results as it shows me results connected with adjusting system volume (sound).</p>
  
  <p>I've also tried <code>diskpart</code> but there's no difference in details between disk which could be system volume and those which could not.</p>
  
  <p>Does anyone have any idea of how to check it?</p>