This is how you change DVD drive letter in PowerShell.
(gwmi Win32_cdromdrive).drive | %{$a = mountvol $_ /l;mountvol $_ /d;$a = $a.Trim();mountvol z: $a}
Windows 2012: PowerShell
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This is how you change DVD drive letter in PowerShell.
(gwmi Win32_cdromdrive).drive | %{$a = mountvol $_ /l;mountvol $_ /d;$a = $a.Trim();mountvol z: $a}