title: Defrag a virtual hard disk (.vhd)?
body: <p>Like any other hard disk, virtual hard discs (*.vhd) will suffer from fragmentation. </p>
  
  <p>So to keep good performance i guess i have to defrag first the virtual hard disc from within the virtual machine and also the (physical) hard disc the .vhd is stored on.</p>
  
  <p>First, are these assumption correct?
  And second, is there a way to defrag both (virtual and physical hard disc) at once?</p>
  
  <p>Thanks in advance!</p>