单项选择题 An administrator attempts to install the latest security patches for an older server. When the administrator runs the patch installer， the install fails. The administrator tries again， and the installer fails again.  Which of the following is the MOST likely reason for this？（）

单项选择题 WhichofthefollowingcanhelppreventdatalossonaRAIDarrayintheeventofapowerfailure？（）

单项选择题 WhichofthefollowingistheMOSTimportantconsiderationbeforemakingachangetoaserver？（）