单项选择题
Which of the following tools should be used to analyze the placement of file fragments on a mirrored logical volume？（）
A. df
B. lslv
C. filemon
D. fileplace
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Themaxmbuffislowbydefaultforsystemsexpectinghighnetworktrafficand/orusage.Whichofthefollowingutilitiesshouldbeusedtoreportrequestsformbufsthathavefailedand/orbeendenied？（）
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