单项选择题
A.number of users.
B.number of files.
C.memory usage.
D.average disk I/O
单项选择题 WhichofthefollowingBESTdescribesRAID5？（）
单项选择题 An administrator notes that after a recent power outage, some open files were corrupted on one affected file server. Which of the following items should the administrator consider to determine the cause of this corruption?（）
单项选择题 AdiskdrivefailedinaRAID5array.Afterreplacingthediskdrive，usersarestillreportingthat accesstotheserverisveryslow.WhichofthefollowingBESTexplainstheproblem？（）