title: What is backup mode in Robocopy
body: <p>I am trying to copy a large database backup file over network.</p>
  
  <p>The <code>.net FileInfo.CopyTo</code> or <code>xcopy</code> failed with different binary resulted. Also tried <code>robocopy</code> without parameter, and resulted a failure. Just did another attempt with <code>robocopy</code> using <code>/zb</code> parameter (restart and backup mode). It took much longer but resulted in a success.</p>
  
  <p>My question is, is backup mode in <code>robocopy</code> really designed to copy large / backup file? Have searched through net and couldn't find a clear answer. </p>
  
  <p>Would appreciate if any experienced user could give me a hint or better solution on large file copy over network. Thanks.</p>