看来你是理解反了!机器翻译的不好看,看E文:http://support.microsoft.com/kb/892846/en-us
SYMPTOMS:You may find that the startup drive volume is assigned the drive letter "X" in Microsoft Windows Preinstallation Environment (Windows PE) 2004 and Microsoft Windows Preinstallation Environment (Windows PE) 2005. This behavior may affect custom scripts that you use with Windows PE 2004 or Windows PE 2005.
是说将PE启动盘分配为X盘,MS说这是个错误。应该是将Ramdisk分配给X盘才是正确的。